diff --git a/honoka/libhonoka/honokatimer.cpp b/honoka/libhonoka/honokatimer.cpp
index e5f9b72..aaf902b 100644
--- a/honoka/libhonoka/honokatimer.cpp
+++ b/honoka/libhonoka/honokatimer.cpp
@@ -84,10 +84,12 @@
 {
     Transaction trans;
     uint32 counter = 1;
+    pid_t p = getpid();
     while(1) {
         usleep(HONOKA_TIMER_INTERVAL);
         trans.clear();
         trans.put_command(HONOKA_TRANS_TIMER);
+        trans.put_data((uint32)p);
         trans.put_data(counter);
         agent.send_imengine_event(-1,"8bb03c1c-db6c-41b1-91bd-b7fb7dd70343",trans);
         counter ++;
@@ -115,8 +117,10 @@
     int cmd;
     if (reader.get_command(cmd)) {
         if (cmd == HONOKA_TRANS_TIMER) {
-            uint32 c;
+            uint32 p,c;
+            reader.get_data(p);
             reader.get_data(c);
+            if (p != (uint32)timer_pid) return 0;
             return c;
         }
     }