diff --git a/src/brpc/periodic_task.h b/src/brpc/periodic_task.h
index db97fff80a..88dc739cd9 100644
--- a/src/brpc/periodic_task.h
+++ b/src/brpc/periodic_task.h
@@ -19,6 +19,8 @@
 #ifndef BRPC_PERIODIC_TASK_H
 #define BRPC_PERIODIC_TASK_H
 
+#include <ctime>
+
 namespace brpc {
 
 // Override OnTriggeringTask() with code that needs to be periodically run. If