diff --git a/src/ops.c b/src/ops.c
index 0eb5903..3ee6e55 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -2891,7 +2891,7 @@
  * register and then concatenate the old and the new one (so we keep the old
  * one in case of out-of-memory).
  *
- * return FAIL for failure, OK otherwise
+ * Return FAIL for failure, OK otherwise.
  */
     int
 op_yank(oap, deleting, mess)