diff --git a/src/services/codefixes/fixAddMissingMember.ts b/src/services/codefixes/fixAddMissingMember.ts
index 42f4310ffba..190fba39043 100644
--- a/src/services/codefixes/fixAddMissingMember.ts
+++ b/src/services/codefixes/fixAddMissingMember.ts
@@ -369,7 +369,7 @@ function getInfo(sourceFile: SourceFile, tokenPos: number, errorCode: number, ch
         const moduleDeclaration = find(symbol.declarations, isModuleDeclaration);
         const moduleDeclarationSourceFile = moduleDeclaration?.getSourceFile();
         if (moduleDeclaration && moduleDeclarationSourceFile && !isSourceFileFromLibrary(program, moduleDeclarationSourceFile)) {
-            return { kind: InfoKind.Function, token, call: parent.parent, sourceFile, modifierFlags: ModifierFlags.Export, parentDeclaration: moduleDeclaration };
+            return { kind: InfoKind.Function, token, call: parent.parent, sourceFile: moduleDeclarationSourceFile, modifierFlags: ModifierFlags.Export, parentDeclaration: moduleDeclaration };
         }
 
         const moduleSourceFile = find(symbol.declarations, isSourceFile);
diff --git a/tests/cases/fourslash/codeFixAddMissingFunctionDeclaration29.ts b/tests/cases/fourslash/codeFixAddMissingFunctionDeclaration29.ts
new file mode 100644
index 00000000000..1a6c1b73ae9
--- /dev/null
+++ b/tests/cases/fourslash/codeFixAddMissingFunctionDeclaration29.ts
@@ -0,0 +1,27 @@
+/// <reference path='fourslash.ts' />
+
+// @filename: /a.ts
+////export namespace A {
+////    export function test() {}
+////};
+
+// @filename: /b.ts
+////import { A } from "./a";
+////
+////A.fn();
+
+goTo.file("/b.ts");
+verify.codeFix({
+    description: [ts.Diagnostics.Add_missing_function_declaration_0.message, "fn"],
+    index: 0,
+    newFileContent: {
+        "/a.ts":
+`export namespace A {
+    export function test() {}
+
+    export function fn() {
+        throw new Error("Function not implemented.");
+    }
+};`,
+    }
+});