diff --git a/src/common/event.h b/src/common/event.h
index 0945ae7d..95b462c2 100644
--- a/src/common/event.h
+++ b/src/common/event.h
@@ -30,6 +30,7 @@
 
 #include <memory>
 #include <mutex>
+#include <string>
 
 /**
   \enum EventType