diff --git a/completions/rbenv.zsh b/completions/rbenv.zsh
index c439c5a..5b23d42 100644
--- a/completions/rbenv.zsh
+++ b/completions/rbenv.zsh
@@ -11,7 +11,7 @@ _rbenv() {
   if [ "${#words}" -eq 2 ]; then
     completions="$(rbenv commands)"
   else
-    completions="$(rbenv completions ${words[2,-1]})"
+    completions="$(rbenv completions ${words[2,-2]})"
   fi
 
   reply=("${(ps:\n:)completions}")