diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index bbbabc8..e3f1abe 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -29,6 +29,7 @@
 #include "xfs_inode.h"
 #include "xfs_alloc.h"
 #include "xfs_error.h"
+#include "xfs_extent_busy.h"
 #include "xfs_discard.h"
 #include "xfs_trace.h"