diff --git a/dlls/mscoree/mscoree_private.h b/dlls/mscoree/mscoree_private.h
index a2532625cf1..15396f887ad 100644
--- a/dlls/mscoree/mscoree_private.h
+++ b/dlls/mscoree/mscoree_private.h
@@ -161,6 +161,6 @@ extern HRESULT RuntimeHost_Destroy(RuntimeHost *This) DECLSPEC_HIDDEN;
 
 HRESULT WINAPI CLRMetaHost_GetRuntime(ICLRMetaHost* iface, LPCWSTR pwzVersion, REFIID iid, LPVOID *ppRuntime) DECLSPEC_HIDDEN;
 
-extern void cordebug_init(RuntimeHost *This);
+extern void cordebug_init(RuntimeHost *This) DECLSPEC_HIDDEN;
 
 #endif   /* __MSCOREE_PRIVATE__ */