diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index a0dc6e5..bf87a59 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -2062,7 +2062,7 @@
 	/*
 	 * Free the fake mp structure.
 	 */
-	kmem_free(nmp, sizeof(*nmp));
+	kmem_free(nmp);
 
 	return error;
 }