diff --git a/osdep/io.c b/osdep/io.c
index b949746e6e..cc99c24370 100644
--- a/osdep/io.c
+++ b/osdep/io.c
@@ -18,6 +18,8 @@
  * with mplayer2.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "config.h"
+
 #ifdef _WIN32
 
 #include <windows.h>