diff --git a/dlls/crtdll/crtdll.spec b/dlls/crtdll/crtdll.spec
index 1eaf0e95b40..87bf5baac4a 100644
--- a/dlls/crtdll/crtdll.spec
+++ b/dlls/crtdll/crtdll.spec
@@ -30,7 +30,7 @@ debug_channels (crtdll)
 @ forward _CItanh msvcrt._CItanh
 @ forward _HUGE_dll msvcrt._HUGE
 @ forward _XcptFilter msvcrt._XcptFilter
-@ forward __GetMainArgs msvcrt.__getmainargs
+@ cdecl __GetMainArgs(ptr ptr ptr long) __GetMainArgs
 @ forward __argc_dll msvcrt.__argc
 @ forward __argv_dll msvcrt.__argv
 @ forward __dllonexit msvcrt.__dllonexit
diff --git a/dlls/crtdll/crtdll_main.c b/dlls/crtdll/crtdll_main.c
index a84d1e4b14c..96bb702aa73 100644
--- a/dlls/crtdll/crtdll_main.c
+++ b/dlls/crtdll/crtdll_main.c
@@ -10,6 +10,10 @@
 
 DEFAULT_DEBUG_CHANNEL(crtdll);
 
+/* from msvcrt */
+extern void __cdecl __getmainargs( int *argc, char ***argv, char **environ,
+                                   int expand_wildcards, void *_startupinfo );
+
 /* The following data items are not exported from msvcrt */
 unsigned int CRTDLL__basemajor_dll;
 unsigned int CRTDLL__baseminor_dll;
@@ -41,3 +45,12 @@ BOOL WINAPI CRTDLL_Init(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)
   }
   return TRUE;
 }
+
+
+/*********************************************************************
+ *                  __GetMainArgs  (CRTDLL.@)
+ */
+void __cdecl __GetMainArgs( int *argc, char ***argv, char **environ, int expand_wildcards )
+{
+    __getmainargs( argc, argv, environ, expand_wildcards, NULL );
+}