diff --git a/bashrc b/bashrc
index e0cb043..6b3dc6e 100755
--- a/bashrc
+++ b/bashrc
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # If not running interactively, don't do anything
-[ -z "$PS1" ] && return
+[[ $- != *i* ]] && return
 
 ##########################################
 null(){