diff --git a/oh-my-zsh.sh b/oh-my-zsh.sh
index 83c8f8057..545d980f0 100644
--- a/oh-my-zsh.sh
+++ b/oh-my-zsh.sh
@@ -14,7 +14,7 @@ fi
 
 # Create cache and completions dir and add to $fpath
 mkdir -p "$ZSH_CACHE_DIR/completions"
-(( ${fpath[(Ie)$ZSH_CACHE_DIR/completions]} )) || fpath=("$ZSH_CACHE_DIR/completions" $fpath)
+(( ${fpath[(Ie)"$ZSH_CACHE_DIR/completions"]} )) || fpath=("$ZSH_CACHE_DIR/completions" $fpath)
 
 # Check for updates on initial load...
 if [ "$DISABLE_AUTO_UPDATE" != "true" ]; then