diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 974ecf5e0d95..346f2617b744 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -3017,6 +3017,9 @@ static int dbFindBits(u32 word, int l2nb)
 	nb = 1 << l2nb;
 	assert(nb <= DBWORD);
 
+	if (nb == DBWORD)
+		return (!!word) << BUDMIN;
+
 	/* complement the word so we can use a mask (i.e. 0s represent
 	 * free bits) and compute the mask.
 	 */