diff --git a/tools/install.sh b/tools/install.sh
index 8ca427d2c..67e7a5aa8 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -6,7 +6,7 @@ fi
 
 echo "\033[0;34mCloning Oh My Zsh...\033[0m"
 which git > /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? -eq 0 ]; then
   /usr/bin/env git clone https://github.com/robbyrussell/oh-my-zsh.git ~/.oh-my-zsh
 else
   echo "git not installed"