diff --git a/src/common/notifications.cpp b/src/common/notifications.cpp
index 9c85482c..544a7312 100644
--- a/src/common/notifications.cpp
+++ b/src/common/notifications.cpp
@@ -19,6 +19,7 @@
 #include <atomic>
 #include <cassert>
 #include <iostream>
+#include <mutex>
 
 #include <dbus/dbus.h>
 #include <dlfcn.h>