diff --git a/glib/gtypes.h b/glib/gtypes.h
index df65836a08a367a0904df7892965c705baf52252..23c5a129568d1985498267c4e19bb05e344a9400 100644
--- a/glib/gtypes.h
+++ b/glib/gtypes.h
@@ -565,7 +565,7 @@ G_END_DECLS
 #    else /* !GLIB_STATIC_COMPILATION */
 #      ifdef GLIB_COMPILATION
 #        ifdef DLL_EXPORT
-#          define GLIB_VAR __declspec(dllexport)
+#          define GLIB_VAR extern __declspec(dllexport)
 #        else /* !DLL_EXPORT */
 #          define GLIB_VAR extern
 #        endif /* !DLL_EXPORT */
diff --git a/gobject/gparamspecs.h b/gobject/gparamspecs.h
index 0309f9bb34e9b45bbddc11d9be70d3c4cb1e6f8b..d0e4d5953f54e39269001285c9b8c55a8aad8995 100644
--- a/gobject/gparamspecs.h
+++ b/gobject/gparamspecs.h
@@ -1150,7 +1150,7 @@ GParamSpec*	g_param_spec_variant	 (const gchar        *name,
 #    else /* !GOBJECT_STATIC_COMPILATION */
 #      ifdef GOBJECT_COMPILATION
 #        ifdef DLL_EXPORT
-#          define GOBJECT_VAR __declspec(dllexport)
+#          define GOBJECT_VAR extern __declspec(dllexport)
 #        else /* !DLL_EXPORT */
 #          define GOBJECT_VAR extern
 #        endif /* !DLL_EXPORT */