diff --git a/lib/helpers.bash b/lib/helpers.bash
index e1787fe0..c1e999ea 100644
--- a/lib/helpers.bash
+++ b/lib/helpers.bash
@@ -80,7 +80,7 @@ _is_function ()
     _about 'sets $? to true if parameter is the name of a function'
     _param '1: name of alleged function'
     _group 'lib'
-    [ -n "$(type -a $1 2>/dev/null | grep 'is a function')" ]
+    [ -n "$(type -a $1 2>/dev/null | egrep 'is a function')|是函数" ]
 }
 
 _bash-it-aliases ()