diff --git a/gtk/src/gtk_binding.cpp b/gtk/src/gtk_binding.cpp
index 232dc2be..d1efffe4 100644
--- a/gtk/src/gtk_binding.cpp
+++ b/gtk/src/gtk_binding.cpp
@@ -75,6 +75,12 @@ Binding::Binding (const Binding& binding)
     this->value = binding.value;
 }
 
+Binding &Binding::operator=(const Binding &binding)
+{
+    this->value = binding.value;
+    return *this;
+}
+
 bool
 Binding::matches (Binding &binding)
 {
diff --git a/gtk/src/gtk_binding.h b/gtk/src/gtk_binding.h
index 5dccd7d8..c4129bff 100644
--- a/gtk/src/gtk_binding.h
+++ b/gtk/src/gtk_binding.h
@@ -37,6 +37,7 @@ class Binding
         Binding (unsigned int key, bool ctrl, bool shift, bool alt);
         Binding (unsigned int device, unsigned int button, unsigned int threshold);
         Binding (const Binding &binding);
+        Binding &operator=(const Binding &binding);
         Binding (GdkEventKey *event);
         Binding (unsigned int);
         Binding ();