diff --git a/packages/dd-trace/src/debugger/devtools_client/condition.js b/packages/dd-trace/src/debugger/devtools_client/condition.js
index e6dc9be16e..16a3b2caaf 100644
--- a/packages/dd-trace/src/debugger/devtools_client/condition.js
+++ b/packages/dd-trace/src/debugger/devtools_client/condition.js
@@ -50,7 +50,7 @@ function compile (node) {
   } else if (type === 'isDefined') {
     return `(() => {
       try {
-        ${value}
+        ${compile(value)}
         return true
       } catch {
         return false
diff --git a/packages/dd-trace/test/debugger/devtools_client/condition-test-cases.js b/packages/dd-trace/test/debugger/devtools_client/condition-test-cases.js
index 745c57767a..cb957f8470 100644
--- a/packages/dd-trace/test/debugger/devtools_client/condition-test-cases.js
+++ b/packages/dd-trace/test/debugger/devtools_client/condition-test-cases.js
@@ -630,18 +630,19 @@ const typeAndDefinitionChecks = [
     true
   ],
 
-  [{ isDefined: 'foo' }, { bar: 42 }, false],
-  [{ isDefined: 'bar' }, { bar: 42 }, true],
-  [{ isDefined: 'bar' }, { bar: undefined }, true],
-  { ast: { isDefined: 'foo' }, suffix: 'const foo = undefined', expected: false },
-  { ast: { isDefined: 'foo' }, suffix: 'const foo = 42', expected: false },
-  { ast: { isDefined: 'foo' }, suffix: 'let foo', expected: false },
-  { ast: { isDefined: 'foo' }, suffix: 'let foo = undefined', expected: false },
-  { ast: { isDefined: 'foo' }, suffix: 'let foo = 42', expected: false },
-  { ast: { isDefined: 'foo' }, suffix: 'var foo', expected: true }, // var is hoisted
-  { ast: { isDefined: 'foo' }, suffix: 'var foo = undefined', expected: true }, // var is hoisted
-  { ast: { isDefined: 'foo' }, suffix: 'var foo = 42', expected: true }, // var is hoisted
-  { ast: { isDefined: 'foo' }, suffix: '', expected: false }
+  [{ isDefined: { ref: 'foo' } }, { bar: 42 }, false],
+  [{ isDefined: { ref: 'bar' } }, { bar: 42 }, true],
+  [{ isDefined: { ref: 'bar' } }, { bar: undefined }, true],
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'const foo = undefined', expected: false },
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'const foo = 42', expected: false },
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'let foo', expected: false },
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'let foo = undefined', expected: false },
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'let foo = 42', expected: false },
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'var foo', expected: true }, // var is hoisted
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'var foo = undefined', expected: true }, // var is hoisted
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'var foo = 42', expected: true }, // var is hoisted
+  { ast: { isDefined: { ref: 'foo' } }, suffix: 'function foo () {}', expected: true }, // function is hoisted
+  { ast: { isDefined: { ref: 'foo' } }, suffix: '', expected: false }
 ]
 
 function overloadPropertyWithGetter (obj, propName) {