diff --git a/lmkd.cpp b/lmkd.cpp
index 741e891..b6c934b 100644
--- a/lmkd.cpp
+++ b/lmkd.cpp
@@ -3543,7 +3543,8 @@ static void call_handler(struct event_handler_info* handler_info,
         resume_polling(poll_params, curr_tm);
         break;
     case POLLING_DO_NOT_CHANGE:
-        if (get_time_diff_ms(&poll_params->poll_start_tm, &curr_tm) > PSI_WINDOW_SIZE_MS) {
+        if (poll_params->poll_handler &&
+            get_time_diff_ms(&poll_params->poll_start_tm, &curr_tm) > PSI_WINDOW_SIZE_MS) {
             /* Polled for the duration of PSI window, time to stop */
             poll_params->poll_handler = NULL;
         }