diff --git a/inc/common.hpp b/inc/common.hpp
index 82746ee..1b4911f 100644
--- a/inc/common.hpp
+++ b/inc/common.hpp
@@ -24,7 +24,7 @@
 {
     void operator()(sd_event* event) const
     {
-        event = sd_event_unref(event);
+        sd_event_unref(event);
     }
 };
 using EventPtr = std::unique_ptr<sd_event, EventDeleter>;