diff --git a/install b/install
index 068acde93..ea30fdc4f 100755
--- a/install
+++ b/install
@@ -17,7 +17,7 @@ RUBYSUFFIX=''
 
 command_exists () {
 
-  command -v "$1" /dev/null 2&>/dev/null
+  command -v "${1}" >/dev/null 2>&1
 }