diff --git a/dlls/d3drm/d3drm_private.h b/dlls/d3drm/d3drm_private.h
index 3daf96a62da..80da952bb31 100644
--- a/dlls/d3drm/d3drm_private.h
+++ b/dlls/d3drm/d3drm_private.h
@@ -44,6 +44,6 @@ struct d3drm_file_header
     DWORD flags;
 };
 
-extern char templates[];
+extern char templates[] DECLSPEC_HIDDEN;
 
 #endif /* __D3DRM_PRIVATE_INCLUDED__ */