diff --git a/ChangeLog b/ChangeLog
index de38f61ea2..e93210dde9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Feb 20 14:44:15 2016  Lucas Buchala  <lucasbuchala@gmail.com>
+
+	* vm_eval.c (rb_mod_module_eval): [DOC] Fix documentation
+	  signature for Module#module_eval.  [Fix GH-1258]
+
 Sat Feb 20 14:40:44 2016  Adam O'Connor  <northband@gmail.com>
 
 	* README.md: a few grammatical changes to the main Ruby README.md.
diff --git a/vm_eval.c b/vm_eval.c
index 13a9efe556..5bdc948c75 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -1743,7 +1743,9 @@ rb_obj_instance_exec(int argc, const VALUE *argv, VALUE self)
 /*
  *  call-seq:
  *     mod.class_eval(string [, filename [, lineno]])  -> obj
- *     mod.module_eval {|| block }                     -> obj
+ *     mod.class_eval {|mod| block }                   -> obj
+ *     mod.module_eval(string [, filename [, lineno]]) -> obj
+ *     mod.module_eval {|mod| block }                  -> obj
  *
  *  Evaluates the string or block in the context of _mod_, except that when
  *  a block is given, constant/class variable lookup is not affected. This