diff --git a/dlls/shlwapi/shlwapi_main.c b/dlls/shlwapi/shlwapi_main.c
index e595d5fefb..b51d3d6d10 100644
--- a/dlls/shlwapi/shlwapi_main.c
+++ b/dlls/shlwapi/shlwapi_main.c
@@ -30,8 +30,8 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(shell);
 
-HINSTANCE shlwapi_hInstance = 0;
-DWORD SHLWAPI_ThreadRef_index = TLS_OUT_OF_INDEXES;
+DECLSPEC_HIDDEN HINSTANCE shlwapi_hInstance = 0;
+DECLSPEC_HIDDEN DWORD SHLWAPI_ThreadRef_index = TLS_OUT_OF_INDEXES;
 
 /*************************************************************************
  * SHLWAPI {SHLWAPI}