diff --git a/src/lib/subs/coastal.c b/src/lib/subs/coastal.c
index 6228ea14..c6b1bd2f 100644
--- a/src/lib/subs/coastal.c
+++ b/src/lib/subs/coastal.c
@@ -93,7 +93,6 @@ coastal_land_to_sea(coord x, coord y)
 /*
  * Compute coastal flags for a change of SP from OLDDES to NEWDES.
  * Update adjacent sectors, but don't touch SP.
- * Return new coastal flag for SP.
  */
 void
 set_coastal(struct sctstr *sp, int olddes, int newdes)