diff --git a/core/timermanager.cpp b/core/timermanager.cpp
index 3cc3ec2..a48eb16 100644
--- a/core/timermanager.cpp
+++ b/core/timermanager.cpp
@@ -25,6 +25,8 @@ along with this program. If not, see .
#include "timermanager.h"
#include
+#include
+#include
TimerManager* TimerManager::timer_manager;