diff --git a/libexec/rbenv-init b/libexec/rbenv-init
index 4fb8d2e1..cd327fad 100755
--- a/libexec/rbenv-init
+++ b/libexec/rbenv-init
@@ -114,7 +114,7 @@ function rbenv
 
   switch "\$command"
   case ${commands[*]}
-    source (rbenv "sh-\$command" \$argv|psub)
+    rbenv "sh-\$command" \$argv|source
   case '*'
     command rbenv "\$command" \$argv
   end