diff --git a/plugins/rvm/rvm.plugin.zsh b/plugins/rvm/rvm.plugin.zsh
index cdd0a7847..68485a577 100644
--- a/plugins/rvm/rvm.plugin.zsh
+++ b/plugins/rvm/rvm.plugin.zsh
@@ -31,7 +31,7 @@ compdef _rb19 rb19
 
 function rb20 {
 	if [ -z "$1" ]; then
-		rvm use "$ruby"
+		rvm use "$ruby20"
 	else
 		rvm use "$ruby20@$1"
 	fi