diff --git a/object.c b/object.c
index 87ce20b3de..49619fac65 100644
--- a/object.c
+++ b/object.c
@@ -808,7 +808,7 @@ nil_to_a(obj)
 
 /*
  *  call-seq:
- *    nil.to_s  => "nil"
+ *    nil.inspect  => "nil"
  *
  *  Always returns the string "nil".
  */