diff --git a/completion/brew.completion.bash b/completion/brew.completion.bash
index a0d9819..371fe77 100644
--- a/completion/brew.completion.bash
+++ b/completion/brew.completion.bash
@@ -1,4 +1,4 @@
-if [ `which brew` ]; then
+if which brew >/dev/null 2>&1; then
   if [ -f `brew --prefix`/Library/Contributions/brew_bash_completion.sh ]; then
     . `brew --prefix`/Library/Contributions/brew_bash_completion.sh
   fi