diff --git a/ext/a52dec/gsta52dec.c b/ext/a52dec/gsta52dec.c
index 69248c528a..9481f19bb7 100644
--- a/ext/a52dec/gsta52dec.c
+++ b/ext/a52dec/gsta52dec.c
@@ -17,6 +17,10 @@
  * Boston, MA 02111-1307, USA.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <string.h>
 
 #include <stdlib.h>