diff --git a/oh-my-zsh.sh b/oh-my-zsh.sh
index 2ae07668..3c0f4f8f 100644
--- a/oh-my-zsh.sh
+++ b/oh-my-zsh.sh
@@ -1,6 +1,6 @@
 # Check for updates on initial load...
 if [ "$DISABLE_AUTO_UPDATE" != "true" ]; then
-  /usr/bin/env ZSH=$ZSH DISABLE_UPDATE_PROMPT=$DISABLE_UPDATE_PROMPT zsh $ZSH/tools/check_for_upgrade.sh
+  /usr/bin/env ZSH=$ZSH DISABLE_UPDATE_PROMPT=$DISABLE_UPDATE_PROMPT zsh -f $ZSH/tools/check_for_upgrade.sh
 fi
 
 # Initializes Oh My Zsh