diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 455daec2b6cefc329dd1ae63a27d1b2de8f524d9..fe91305e12fbc0756da6429e4c9e2189740a143f 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1293,7 +1293,7 @@ struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree,
  * returned if we find something, and *start_ret and *end_ret are
  * set to reflect the state struct that was found.
  *
- * If nothing was found, 1 is returned, < 0 on error
+ * If nothing was found, 1 is returned. If found something, return 0.
  */
 int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
 			  u64 *start_ret, u64 *end_ret, int bits)