diff --git a/src/keeshare/KeeShareSettings.cpp b/src/keeshare/KeeShareSettings.cpp
index 5b087a29..a640cdae 100644
--- a/src/keeshare/KeeShareSettings.cpp
+++ b/src/keeshare/KeeShareSettings.cpp
@@ -28,6 +28,8 @@
 #include <QPainter>
 #include <QPushButton>
 
+#include <functional>
+
 namespace KeeShareSettings
 {
     namespace