diff --git a/core/function.go b/core/function.go
index 7f27a1c..7721fc2 100644
--- a/core/function.go
+++ b/core/function.go
@@ -60,7 +60,7 @@ func AddCommand(prefix string, cmds []Function) {
 			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] = regexp.MustCompile(`\?$`).ReplaceAllString(cmds[j].Rules[i], `(.+)`)
-			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], " ", `\s+?`, -1)
+			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], " ", `\s+`, -1)
 			cmds[j].Rules[i] = strings.Replace(cmds[j].Rules[i], "?", `(\S+)`, -1)
 			cmds[j].Rules[i] = "^" + cmds[j].Rules[i] + "$"
 		}