diff --git a/src/app/browser/main/tab/label.hpp b/src/app/browser/main/tab/label.hpp
index e2865495..384d7350 100644
--- a/src/app/browser/main/tab/label.hpp
+++ b/src/app/browser/main/tab/label.hpp
@@ -5,6 +5,7 @@
 #include <glibmm/refptr.h>
 #include <gtkmm/gestureclick.h>
 #include <gtkmm/label.h>
+#include <sigc++/functors/mem_fun.h>
 
 namespace app::browser::main::tab
 {