diff --git a/chip/zirq_dispatcher.cpp b/chip/zirq_dispatcher.cpp
index d2a3209..a9f53ff 100644
--- a/chip/zirq_dispatcher.cpp
+++ b/chip/zirq_dispatcher.cpp
@@ -10,8 +10,8 @@ extern "C" {
  * @param htim
  */
 void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
-#ifdef IFLTYOP_ZTICKET_TIMER
-  if (htim->Instance == IFLTYOP_ZTICKET_TIMER) {
+#ifdef PC_SYS_ZTICKET_TIMER
+  if (htim->Instance == PC_SYS_ZTICKET_TIMER) {
     HAL_IncTick();
     return;
   }