diff --git a/bgpq3.h b/bgpq3.h
index 5fb7174..f49ff5e 100644
--- a/bgpq3.h
+++ b/bgpq3.h
@@ -3,6 +3,9 @@
 
 #if HAVE_SYS_QUEUE_H
 #include <sys/queue.h>
+#ifndef STAILQ_ENTRY
+#include "sys_queue.h"
+#endif
 #else
 #include "sys_queue.h"
 #endif