diff --git a/racket/src/worksp/gc2/make.rkt b/racket/src/worksp/gc2/make.rkt
index 468f416362..8aee356f5c 100644
--- a/racket/src/worksp/gc2/make.rkt
+++ b/racket/src/worksp/gc2/make.rkt
@@ -51,6 +51,7 @@
     "jitprep"
     "jitstack"
     "jitstate"
+    "letrec_check"
     "list"
     "marshal"
     "module"
diff --git a/racket/src/worksp/libracket/libracket.vcproj b/racket/src/worksp/libracket/libracket.vcproj
index fc9c0fc89e..05d6cc5b8a 100644
--- a/racket/src/worksp/libracket/libracket.vcproj
+++ b/racket/src/worksp/libracket/libracket.vcproj
@@ -653,6 +653,10 @@
 				RelativePath="..\..\Racket\Src\List.c"
 				>
 			</File>
+			<File
+				RelativePath="..\..\Racket\Src\letrec_check.c"
+				>
+			</File>
 			<File
 				RelativePath="..\..\Racket\Src\module.c"
 				>
diff --git a/racket/src/worksp10/libracket/libracket.vcxproj b/racket/src/worksp10/libracket/libracket.vcxproj
index 9654f1b7f4..2cf4bab04f 100644
--- a/racket/src/worksp10/libracket/libracket.vcxproj
+++ b/racket/src/worksp10/libracket/libracket.vcxproj
@@ -209,6 +209,7 @@
     <ClCompile Include="..\..\Racket\Src\jitprep.c" />
     <ClCompile Include="..\..\Racket\Src\jitstack.c" />
     <ClCompile Include="..\..\Racket\Src\jitstate.c" />
+    <ClCompile Include="..\..\Racket\Src\letrec_check.c" />
     <ClCompile Include="..\..\Racket\Src\List.c" />
     <ClCompile Include="..\..\Racket\Src\marshal.c" />
     <ClCompile Include="..\..\Racket\Src\module.c" />