diff --git a/gdk/win32/gdkmain-win32.c b/gdk/win32/gdkmain-win32.c
index 23f76b4e25..043341a255 100644
--- a/gdk/win32/gdkmain-win32.c
+++ b/gdk/win32/gdkmain-win32.c
@@ -49,6 +49,7 @@
 
 static gboolean gdk_synchronize = FALSE;
 
+#ifdef DLL_EXPORT
 BOOL WINAPI
 DllMain (HINSTANCE hinstDLL,
 	 DWORD     dwReason,
@@ -58,6 +59,7 @@ DllMain (HINSTANCE hinstDLL,
 
   return TRUE;
 }
+#endif
 
 void
 _gdk_win32_windowing_init (void)
diff --git a/gtk/gtkwin32.c b/gtk/gtkwin32.c
index bf707ad743..a086ad61ac 100644
--- a/gtk/gtkwin32.c
+++ b/gtk/gtkwin32.c
@@ -41,6 +41,7 @@
 
 static HMODULE gtk_dll;
 
+#ifdef DLL_EXPORT
 BOOL WINAPI
 DllMain (HINSTANCE hinstDLL,
          DWORD     fdwReason,
@@ -55,6 +56,7 @@ DllMain (HINSTANCE hinstDLL,
 
   return TRUE;
 }
+#endif
 
 static BOOL CALLBACK
 find_first_manifest (HMODULE  module_handle,