diff --git a/src/core/core_timing.h b/src/core/core_timing.h
index 5c9ee2902..901bf532e 100644
--- a/src/core/core_timing.h
+++ b/src/core/core_timing.h
@@ -5,6 +5,7 @@
 
 #include <atomic>
 #include <chrono>
+#include <condition_variable>
 #include <functional>
 #include <memory>
 #include <mutex>