diff --git a/src/public/user.ts b/src/public/user.ts
index b782d62..aedad8a 100644
--- a/src/public/user.ts
+++ b/src/public/user.ts
@@ -298,6 +298,8 @@ export class UserFun {
                     change = true;
                     gud.headFrames[conf.id] = -1;
                 } else if (val > 0 && gud.headFrames[conf.id] != -1) {
+                }
+                else if (val >= 0) {
                     change = true;
                     gud.headFrames[conf.id] = G.time + val * v;
                 }
@@ -384,7 +386,7 @@ export class UserFun {
             if (conf?.cond?.[0] == 'time') {
                 let val = conf.cond[1];
 
-                if (val == -1) {
+                if (val == -1 && !gud.headFrames[conf.id]) {
                     change = true;
                     gud.headFrames[conf.id] = -1;
                 }