diff --git a/include/linux/dlm_plock.h b/include/linux/dlm_plock.h
index 18d5fdbceb74..2dd21243104f 100644
--- a/include/linux/dlm_plock.h
+++ b/include/linux/dlm_plock.h
@@ -9,6 +9,8 @@
 #ifndef __DLM_PLOCK_DOT_H__
 #define __DLM_PLOCK_DOT_H__
 
+#include <linux/types.h>
+
 #define DLM_PLOCK_MISC_NAME		"dlm_plock"
 
 #define DLM_PLOCK_VERSION_MAJOR	1