diff --git a/cmd/helm/completion.go b/cmd/helm/completion.go
index 962f06e3b..039dcbe5f 100644
--- a/cmd/helm/completion.go
+++ b/cmd/helm/completion.go
@@ -213,7 +213,7 @@ __helm_convert_bash_to_zsh() {
 	-e "s/${LWORD}declare${RWORD}/__helm_declare/g" \
 	-e "s/\\\$(type${RWORD}/\$(__helm_type/g" \
 	-e 's/aliashash\["\(.\{1,\}\)"\]/aliashash[\1]/g' \
-	-e 's/FUNCNAME\[0\]/funcstack[1]/g' \
+	-e 's/FUNCNAME/funcstack/g' \
 	<<'BASH_COMPLETION_EOF'
 `
 	out.Write([]byte(zshInitialization))