diff --git a/sys/ufs/ufs/quota.h b/sys/ufs/ufs/quota.h
index 7b9ff4023b6..10aa9d3301a 100644
--- a/sys/ufs/ufs/quota.h
+++ b/sys/ufs/ufs/quota.h
@@ -40,6 +40,10 @@
 #ifndef _UFS_UFS_QUOTA_H_
 #define	_UFS_UFS_QUOTA_H_
 
+#ifndef KERNEL
+#include <sys/queue.h>
+#endif
+
 /*
  * Definitions for disk quotas imposed on the average user
  * (big brother finally hits UNIX).