diff --git a/src/sdeventplus/source/signal.hpp b/src/sdeventplus/source/signal.hpp
index ec8d227..8a8dd38 100644
--- a/src/sdeventplus/source/signal.hpp
+++ b/src/sdeventplus/source/signal.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <functional>
+#include <sdeventplus/event.hpp>
 #include <sdeventplus/source/base.hpp>
 #include <sys/signalfd.h>