diff --git a/dlls/atl/atl_main.c b/dlls/atl/atl_main.c
index 78ef7ceb700..28988351e4a 100644
--- a/dlls/atl/atl_main.c
+++ b/dlls/atl/atl_main.c
@@ -40,7 +40,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(atl);
 
-HINSTANCE hInst;
+DECLSPEC_HIDDEN HINSTANCE hInst;
 
 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 {