diff --git a/core/function.go b/core/function.go
index 242aed5..3d4cc6f 100644
--- a/core/function.go
+++ b/core/function.go
@@ -56,7 +56,7 @@ func AddCommand(prefix string, cmds []Function) {
 			if prefix != "" {
 				cmds[j].Rules[i] = prefix + `\s+` + cmds[j].Rules[i]
 			}
-			cmds[j].Rules[i] = regexp.MustCompile(`\?$`).ReplaceAllString(cmds[j].Rules[i], `.*`)
+			cmds[j].Rules[i] = regexp.MustCompile(`\?$`).ReplaceAllString(cmds[j].Rules[i], `(.*)`)
 			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], "(", `[(]`, -1)
 			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], ")", `[)]`, -1)
 			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], " ", `\s+`, -1)