diff --git a/include/asoundlib-head.h b/include/asoundlib-head.h
index 20c8a68d..6edbab00 100644
--- a/include/asoundlib-head.h
+++ b/include/asoundlib-head.h
@@ -31,6 +31,7 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/types.h>
 #include <string.h>
 #include <fcntl.h>
 #include <assert.h>