diff --git a/include/asoundlib-head.h b/include/asoundlib-head.h
index b4087def..20c8a68d 100644
--- a/include/asoundlib-head.h
+++ b/include/asoundlib-head.h
@@ -33,6 +33,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
+#include <assert.h>
 #include <endian.h>
 #include <sys/poll.h>
 #include <errno.h>