diff --git a/libexec/rbenv-init b/libexec/rbenv-init
index 5c120250..fae07399 100755
--- a/libexec/rbenv-init
+++ b/libexec/rbenv-init
@@ -86,7 +86,7 @@ commands=(`rbenv commands --sh`)
 IFS="|"
 cat <<EOS
 rbenv() {
-  command="\$1"
+  local command="\$1"
   if [ "\$#" -gt 0 ]; then
     shift
   fi