diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 323d77f..f902641 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1052,7 +1052,7 @@
 		i = range->start >> PAGE_CACHE_SHIFT;
 	}
 	if (!max_to_defrag)
-		max_to_defrag = last_index - 1;
+		max_to_defrag = last_index;
 
 	while (i <= last_index && defrag_count < max_to_defrag) {
 		/*