diff --git a/basic/zdelay.c b/basic/zdelay.c
index 67b2c88..ded0378 100644
--- a/basic/zdelay.c
+++ b/basic/zdelay.c
@@ -1,6 +1,7 @@
 #include "zdelay.h"
 
 #include "zbase.h"
+#include "project_configs.h"
 
 extern TIM_HandleTypeDef SDK_DELAY_US_TIMER;