1 files changed, 1 insertions, 1 deletions
diff --git a/eval.c b/eval.c
index ab46894f70..45dc8320d5 100644
--- a/eval.c
+++ b/eval.c
@@ -8137,7 +8137,7 @@ static VALUE method_arity _((VALUE));
  *  returns -1, as it can accept (and ignore) an arbitrary number of
  *  parameters.
  *     
- *     Proc.new {}.arity          #=> -1
+ *     Proc.new {}.arity          #=>  0
  *     Proc.new {||}.arity        #=>  0
  *     Proc.new {|a|}.arity       #=>  1
  *     Proc.new {|a,b|}.arity     #=>  2