diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index f91d39cb1e0b..6308122890ca 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -14,6 +14,7 @@
 #include "dlm_internal.h"
 #include "lock.h"
 #include "user.h"
+#include "ast.h"
 
 #define WAKE_ASTS  0