diff --git a/includes.h b/includes.h
index bae82f5..2a5b6c1 100644
--- a/includes.h
+++ b/includes.h
@@ -157,6 +157,7 @@ typedef u_int32_t uint32_t;
 #endif /* HAVE_UINT32_T */
 
 #ifdef SO_PRIORITY
+#include <linux/types.h>
 #include <linux/pkt_sched.h>
 #endif