diff --git a/glib/gconvert.c b/glib/gconvert.c
index 3deac78..134ded9 100644
--- a/glib/gconvert.c
+++ b/glib/gconvert.c
@@ -30,7 +30,8 @@
 #include <stdlib.h>
 
 #ifdef G_OS_WIN32
-#include "win_iconv.c"
+#define USE_LIBICONV_GNU
+#include <iconv.h>
 #endif
 
 #ifdef G_PLATFORM_WIN32
