diff --git a/include/corosync/sq.h b/include/corosync/sq.h
index 6805fc93..99f953bb 100644
--- a/include/corosync/sq.h
+++ b/include/corosync/sq.h
@@ -34,7 +34,8 @@
 #ifndef SORTQUEUE_H_DEFINED
 #define SORTQUEUE_H_DEFINED
 
-#include "errno.h"
+#include <errno.h>
+#include <string.h>
 
 struct sq {
 	unsigned int head;