diff --git a/javascript/extractor/src/com/semmle/js/extractor/Main.java b/javascript/extractor/src/com/semmle/js/extractor/Main.java
index b8c71d6c93e7..e92553898e8d 100644
--- a/javascript/extractor/src/com/semmle/js/extractor/Main.java
+++ b/javascript/extractor/src/com/semmle/js/extractor/Main.java
@@ -37,7 +37,7 @@ public class Main {
    * A version identifier that should be updated every time the extractor changes in such a way that
    * it may produce different tuples for the same file under the same {@link ExtractorConfig}.
    */
-  public static final String EXTRACTOR_VERSION = "2019-03-07";
+  public static final String EXTRACTOR_VERSION = "2019-03-11";
 
   public static final Pattern NEWLINE = Pattern.compile("\n");
 
diff --git a/javascript/extractor/src/com/semmle/js/parser/TypeScriptASTConverter.java b/javascript/extractor/src/com/semmle/js/parser/TypeScriptASTConverter.java
index 8ce33fb4b465..3eb269b6f00c 100644
--- a/javascript/extractor/src/com/semmle/js/parser/TypeScriptASTConverter.java
+++ b/javascript/extractor/src/com/semmle/js/parser/TypeScriptASTConverter.java
@@ -1595,6 +1595,7 @@ private FunctionExpression convertImplicitFunction(JsonObject node, SourceLocati
     List<ITypeExpression> paramTypes = convertParameterTypes(node);
     List<DecoratorList> paramDecorators = convertParameterDecorators(node);
     List<TypeParameter> typeParameters = convertChildrenNotNull(node, "typeParameters");
+    ITypeExpression thisType = convertThisParameterType(node);
     FunctionExpression method =
         new FunctionExpression(
             loc,
@@ -1607,7 +1608,7 @@ private FunctionExpression convertImplicitFunction(JsonObject node, SourceLocati
             paramTypes,
             paramDecorators,
             returnType,
-            null);
+            thisType);
     attachSymbolInformation(method, node);
     return method;
   }
diff --git a/javascript/extractor/tests/ts/output/trap/thisparameter.ts.trap b/javascript/extractor/tests/ts/output/trap/thisparameter.ts.trap
index 52902ec3e75e..0fed22335c04 100644
--- a/javascript/extractor/tests/ts/output/trap/thisparameter.ts.trap
+++ b/javascript/extractor/tests/ts/output/trap/thisparameter.ts.trap
@@ -608,146 +608,158 @@ scopenesting(#20205,#20200)
 variables(#20206,"arguments",#20205)
 isArgumentsObject(#20206)
 #20207=*
-stmts(#20207,1,#20204,-2,"{}")
-#20208=@"loc,{#10000},8,19,8,20"
-locations_default(#20208,#10000,8,19,8,20)
-hasLocation(#20207,#20208)
-stmtContainers(#20207,#20204)
+typeexprs(#20207,0,#20204,-4,"C")
+hasLocation(#20207,#20127)
+exprContainers(#20207,#20204)
+literals("C","C",#20207)
+typebind(#20207,#20162)
+#20208=*
+stmts(#20208,1,#20204,-2,"{}")
+#20209=@"loc,{#10000},8,19,8,20"
+locations_default(#20209,#10000,8,19,8,20)
+hasLocation(#20208,#20209)
+stmtContainers(#20208,#20204)
 isMethod(#20201)
-#20209=*
-properties(#20209,#20197,3,0,"constructor() {}")
-#20210=@"loc,{#10000},7,9,7,8"
-locations_default(#20210,#10000,7,9,7,8)
-hasLocation(#20209,#20210)
-#20211=*
-exprs(#20211,0,#20209,0,"constructor")
-hasLocation(#20211,#20210)
-enclosingStmt(#20211,#20197)
-exprContainers(#20211,#20001)
-literals("constructor","constructor",#20211)
+#20210=*
+properties(#20210,#20197,3,0,"constructor() {}")
+#20211=@"loc,{#10000},7,9,7,8"
+locations_default(#20211,#10000,7,9,7,8)
+hasLocation(#20210,#20211)
 #20212=*
-exprs(#20212,9,#20209,1,"() {}")
-hasLocation(#20212,#20210)
+exprs(#20212,0,#20210,0,"constructor")
+hasLocation(#20212,#20211)
 enclosingStmt(#20212,#20197)
 exprContainers(#20212,#20001)
+literals("constructor","constructor",#20212)
 #20213=*
-scopes(#20213,1)
-scopenodes(#20212,#20213)
-scopenesting(#20213,#20200)
-#20214=@"var;{arguments};{#20213}"
-variables(#20214,"arguments",#20213)
-isArgumentsObject(#20214)
-#20215=*
-stmts(#20215,1,#20212,-2,"{}")
-hasLocation(#20215,#20210)
-stmtContainers(#20215,#20212)
-isMethod(#20209)
+exprs(#20213,9,#20210,1,"() {}")
+hasLocation(#20213,#20211)
+enclosingStmt(#20213,#20197)
+exprContainers(#20213,#20001)
+#20214=*
+scopes(#20214,1)
+scopenodes(#20213,#20214)
+scopenesting(#20214,#20200)
+#20215=@"var;{arguments};{#20214}"
+variables(#20215,"arguments",#20214)
+isArgumentsObject(#20215)
 #20216=*
-stmts(#20216,34,#20001,4,"interfa ... : I);\n}")
-#20217=@"loc,{#10000},11,1,13,1"
-locations_default(#20217,#10000,11,1,13,1)
-hasLocation(#20216,#20217)
-stmtContainers(#20216,#20001)
-#20218=*
-typeexprs(#20218,1,#20216,0,"I")
-hasLocation(#20218,#20138)
-enclosingStmt(#20218,#20216)
-exprContainers(#20218,#20001)
-literals("I","I",#20218)
-typedecl(#20218,#20163)
+stmts(#20216,1,#20213,-2,"{}")
+hasLocation(#20216,#20211)
+stmtContainers(#20216,#20213)
+isMethod(#20210)
+#20217=*
+stmts(#20217,34,#20001,4,"interfa ... : I);\n}")
+#20218=@"loc,{#10000},11,1,13,1"
+locations_default(#20218,#10000,11,1,13,1)
+hasLocation(#20217,#20218)
+stmtContainers(#20217,#20001)
 #20219=*
-properties(#20219,#20216,2,0,"method(this: I);")
-#20220=@"loc,{#10000},12,3,12,18"
-locations_default(#20220,#10000,12,3,12,18)
-hasLocation(#20219,#20220)
-#20221=*
-exprs(#20221,0,#20219,0,"method")
-hasLocation(#20221,#20142)
-enclosingStmt(#20221,#20216)
-exprContainers(#20221,#20001)
-literals("method","method",#20221)
+typeexprs(#20219,1,#20217,0,"I")
+hasLocation(#20219,#20138)
+enclosingStmt(#20219,#20217)
+exprContainers(#20219,#20001)
+literals("I","I",#20219)
+typedecl(#20219,#20163)
+#20220=*
+properties(#20220,#20217,2,0,"method(this: I);")
+#20221=@"loc,{#10000},12,3,12,18"
+locations_default(#20221,#10000,12,3,12,18)
+hasLocation(#20220,#20221)
 #20222=*
-exprs(#20222,9,#20219,1,"method(this: I);")
-hasLocation(#20222,#20220)
-enclosingStmt(#20222,#20216)
+exprs(#20222,0,#20220,0,"method")
+hasLocation(#20222,#20142)
+enclosingStmt(#20222,#20217)
 exprContainers(#20222,#20001)
+literals("method","method",#20222)
 #20223=*
-scopes(#20223,1)
-scopenodes(#20222,#20223)
-scopenesting(#20223,#20000)
-#20224=@"var;{arguments};{#20223}"
-variables(#20224,"arguments",#20223)
-isArgumentsObject(#20224)
-isMethod(#20219)
-isAbstractMember(#20219)
-#20225=*
-entry_cfg_node(#20225,#20001)
-#20226=@"loc,{#10000},1,1,1,0"
-locations_default(#20226,#10000,1,1,1,0)
-hasLocation(#20225,#20226)
+exprs(#20223,9,#20220,1,"method(this: I);")
+hasLocation(#20223,#20221)
+enclosingStmt(#20223,#20217)
+exprContainers(#20223,#20001)
+#20224=*
+scopes(#20224,1)
+scopenodes(#20223,#20224)
+scopenesting(#20224,#20000)
+#20225=@"var;{arguments};{#20224}"
+variables(#20225,"arguments",#20224)
+isArgumentsObject(#20225)
+#20226=*
+typeexprs(#20226,0,#20223,-4,"I")
+hasLocation(#20226,#20150)
+exprContainers(#20226,#20223)
+literals("I","I",#20226)
+typebind(#20226,#20163)
+isMethod(#20220)
+isAbstractMember(#20220)
 #20227=*
-exit_cfg_node(#20227,#20001)
-hasLocation(#20227,#20157)
-successor(#20216,#20227)
-successor(#20212,#20209)
-#20228=*
-entry_cfg_node(#20228,#20212)
-hasLocation(#20228,#20210)
+entry_cfg_node(#20227,#20001)
+#20228=@"loc,{#10000},1,1,1,0"
+locations_default(#20228,#10000,1,1,1,0)
+hasLocation(#20227,#20228)
 #20229=*
-exit_cfg_node(#20229,#20212)
-hasLocation(#20229,#20210)
-successor(#20215,#20229)
-successor(#20228,#20215)
-successor(#20211,#20212)
-successor(#20209,#20197)
-successor(#20204,#20201)
+exit_cfg_node(#20229,#20001)
+hasLocation(#20229,#20157)
+successor(#20217,#20229)
+successor(#20213,#20210)
 #20230=*
-entry_cfg_node(#20230,#20204)
-#20231=@"loc,{#10000},8,3,8,2"
-locations_default(#20231,#10000,8,3,8,2)
-hasLocation(#20230,#20231)
+entry_cfg_node(#20230,#20213)
+hasLocation(#20230,#20211)
+#20231=*
+exit_cfg_node(#20231,#20213)
+hasLocation(#20231,#20211)
+successor(#20216,#20231)
+successor(#20230,#20216)
+successor(#20212,#20213)
+successor(#20210,#20197)
+successor(#20204,#20201)
 #20232=*
-exit_cfg_node(#20232,#20204)
-#20233=@"loc,{#10000},8,21,8,20"
-locations_default(#20233,#10000,8,21,8,20)
+entry_cfg_node(#20232,#20204)
+#20233=@"loc,{#10000},8,3,8,2"
+locations_default(#20233,#10000,8,3,8,2)
 hasLocation(#20232,#20233)
-successor(#20207,#20232)
-successor(#20230,#20207)
+#20234=*
+exit_cfg_node(#20234,#20204)
+#20235=@"loc,{#10000},8,21,8,20"
+locations_default(#20235,#10000,8,21,8,20)
+hasLocation(#20234,#20235)
+successor(#20208,#20234)
+successor(#20232,#20208)
 successor(#20203,#20204)
-successor(#20201,#20211)
+successor(#20201,#20212)
 successor(#20199,#20203)
-successor(#20197,#20216)
+successor(#20197,#20217)
 successor(#20188,#20199)
 successor(#20174,#20177)
 successor(#20178,#20175)
-#20234=*
-entry_cfg_node(#20234,#20178)
-#20235=@"loc,{#10000},3,9,3,8"
-locations_default(#20235,#10000,3,9,3,8)
-hasLocation(#20234,#20235)
 #20236=*
-exit_cfg_node(#20236,#20178)
-#20237=@"loc,{#10000},3,45,3,44"
-locations_default(#20237,#10000,3,45,3,44)
+entry_cfg_node(#20236,#20178)
+#20237=@"loc,{#10000},3,9,3,8"
+locations_default(#20237,#10000,3,9,3,8)
 hasLocation(#20236,#20237)
-successor(#20186,#20236)
+#20238=*
+exit_cfg_node(#20238,#20178)
+#20239=@"loc,{#10000},3,45,3,44"
+locations_default(#20239,#10000,3,45,3,44)
+hasLocation(#20238,#20239)
+successor(#20186,#20238)
 successor(#20182,#20186)
-successor(#20234,#20182)
+successor(#20236,#20182)
 successor(#20177,#20178)
 successor(#20175,#20188)
 successor(#20164,#20174)
-#20238=*
-entry_cfg_node(#20238,#20164)
-hasLocation(#20238,#20226)
-#20239=*
-exit_cfg_node(#20239,#20164)
-#20240=@"loc,{#10000},1,47,1,46"
-locations_default(#20240,#10000,1,47,1,46)
-hasLocation(#20239,#20240)
-successor(#20172,#20239)
+#20240=*
+entry_cfg_node(#20240,#20164)
+hasLocation(#20240,#20228)
+#20241=*
+exit_cfg_node(#20241,#20164)
+#20242=@"loc,{#10000},1,47,1,46"
+locations_default(#20242,#10000,1,47,1,46)
+hasLocation(#20241,#20242)
+successor(#20172,#20241)
 successor(#20168,#20172)
-successor(#20238,#20168)
+successor(#20240,#20168)
 successor(#20165,#20164)
-successor(#20225,#20165)
+successor(#20227,#20165)
 numlines(#10000,14,9,0)
 filetype(#10000,"typescript")
diff --git a/javascript/ql/test/library-tests/TypeScript/TypeAnnotations/tests.expected b/javascript/ql/test/library-tests/TypeScript/TypeAnnotations/tests.expected
index e3a4785d905d..5e4184551667 100644
--- a/javascript/ql/test/library-tests/TypeScript/TypeAnnotations/tests.expected
+++ b/javascript/ql/test/library-tests/TypeScript/TypeAnnotations/tests.expected
@@ -150,6 +150,7 @@ test_IsTypeExpr
 | tst.ts:81:38:81:50 | x is typeof x | tst.ts:81:38:81:38 | x | tst.ts:81:43:81:50 | typeof x |
 test_ThisParameterTypes
 | function hasThisParam | tst.ts:116:29:116:32 | void |
+| method hasThisParam of interface InterfaceWithThisParam | tst.ts:119:22:119:43 | Interfa ... isParam |
 test_ChildIndex
 test_TypeArguments
 | tst.ts:102:13:102:29 | f1<string>("foo") | 0 | 1 | tst.ts:102:16:102:21 | string |
diff --git a/javascript/ql/test/query-tests/Declarations/UnusedVariable/thisparam.ts b/javascript/ql/test/query-tests/Declarations/UnusedVariable/thisparam.ts
new file mode 100644
index 000000000000..07f817e287a8
--- /dev/null
+++ b/javascript/ql/test/query-tests/Declarations/UnusedVariable/thisparam.ts
@@ -0,0 +1,11 @@
+import { Foo, Bar, Baz } from "somewhere"; // OK
+
+export function f(this: Foo) {}
+
+export class C {
+  m(this: Bar) {}
+}
+
+export default {
+  foo(this: Baz) {}  
+}