1 files changed, 1 insertions, 1 deletions

diff --git a/src/keymap.c b/src/keymap.c
index 33e3244c061..cc70f6331c7 100644
--- a/src/keymap.c
+++ b/src/keymap.c
@@ -1045,7 +1045,7 @@ the front of KEYMAP.  */)
     }
 }
 
-/* Value is number if KEY is too long; NIL if valid but has no definition. */
+/* Value is number if KEY is too long; nil if valid but has no definition. */
 /* GC is possible in this function if it autoloads a keymap.  */
 
 DEFUN ("lookup-key", Flookup_key, Slookup_key, 2, 3, 0,