diff --git a/ffserver.c b/ffserver.c
index f4a6250b1b..152dd37618 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -35,6 +35,7 @@
 #include <netdb.h>
 #include <ctype.h>
 #include <signal.h>
+#include <assert.h>
 
 #include "bswap.h" // needed for the bitstream writer in common.h which is included in avformat.h
 #include "avformat.h"