diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3a8d1e736f000..261d3e47394f0 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8331,7 +8331,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
                         return factory.createStringLiteral(name, !!singleQuote);
                     }
                     if (isNumericLiteralName(name) && startsWith(name, "-")) {
-                        return factory.createComputedPropertyName(factory.createNumericLiteral(+name));
+                        return factory.createComputedPropertyName(factory.createPrefixUnaryExpression(SyntaxKind.MinusToken, factory.createNumericLiteral(-name)));
                     }
                     return createPropertyNameNodeForIdentifierOrLiteral(name, getEmitScriptTarget(compilerOptions), singleQuote, stringNamed, isMethod);
                 }
diff --git a/tests/cases/fourslash/refactorInferFunctionReturnType25.ts b/tests/cases/fourslash/refactorInferFunctionReturnType25.ts
new file mode 100644
index 0000000000000..3666033e400bd
--- /dev/null
+++ b/tests/cases/fourslash/refactorInferFunctionReturnType25.ts
@@ -0,0 +1,20 @@
+/// <reference path='fourslash.ts' />
+
+////function /*a*//*b*/f() {
+////    return {
+////        [-1]: 0
+////    } as const
+////}
+
+goTo.select("a", "b");
+edit.applyRefactor({
+    refactorName: "Infer function return type",
+    actionName: "Infer function return type",
+    actionDescription: "Infer function return type",
+    newContent:
+`function f(): { readonly [-1]: 0; } {
+    return {
+        [-1]: 0
+    } as const
+}`
+});