diff -r d218b70e1499 -r 4f7e335a95ca ui/gtk/button.c
--- a/ui/gtk/button.c	Thu Dec 25 10:40:35 2025 +0100
+++ b/ui/gtk/button.c	Fri Dec 26 10:19:17 2025 +0100
@@ -505,41 +505,33 @@
 #define RADIOBUTTON_GET_ACTIVE(button) gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button))
 #endif
 
-static void radiobutton_toggled(void *widget, UiVarEventData *event) {
-    gboolean active = RADIOBUTTON_GET_ACTIVE(widget);
-    
+static void radiobutton_toggled(void *widget, UiEventData *event) {
     UiEvent e;
     e.obj = event->obj;
     e.window = event->obj->window;
     e.document = event->obj->ctx->document;
     e.eventdata = NULL;
     e.eventdatatype = 0;
-    e.intval = active;
+    e.intval = RADIOBUTTON_GET_ACTIVE(widget);
     e.set = ui_get_setop();
-    
-    if(event->callback) {
-        event->callback(&e, event->userdata);    
-    }
-    
-    if(active && event->var) {
-        UiInteger *i = event->var->value;
-        
-        e.intval = i->get(i);
-        ui_notify_evt(i->observers, &e);
-    }
+    event->callback(&e, event->userdata);    
 }
 
 typedef struct UiRadioButtonData {
-    UiObject *obj;
-    UiVar *var;
+    UiInteger *value;
+    UiVarEventData *eventdata;
     UiBool first;
 } UiRadioButtonData;
 
 static void destroy_radiobutton(GtkWidget *w, UiRadioButtonData *data) {
     if(data->first) {
-        UiInteger *value = data->var->value;
-        ui_destroy_boundvar(data->obj->ctx, data->var);
-        g_slist_free(value->obj);
+        ui_destroy_vardata(w, data->eventdata);
+        g_slist_free(data->value->obj);
+        data->value->obj = NULL;
+        data->value->get = NULL;
+        data->value->set = NULL;
+    } else {
+        free(data->eventdata);
     }
     free(data);
 }
@@ -562,16 +554,6 @@
     GtkWidget *rbutton = RADIOBUTTON_NEW(rg, args->label); 
     ui_set_name_and_style(rbutton, args->name, args->style_class);
     ui_set_widget_states(obj->ctx, rbutton, args->states);
-    
-    UiVarEventData *event = malloc(sizeof(UiVarEventData));
-    event->obj = obj;
-    event->var = var;
-    event->observers = NULL;
-    event->callback = args->onchange;
-    event->userdata = args->onchangedata;
-    event->customint1 = 0;
-    event->customint2 = 0;
-    
     if(rgroup) {
 #if GTK_MAJOR_VERSION >= 4
         if(rg) {
@@ -589,28 +571,52 @@
         
         ui_radiobutton_set(rgroup, rgroup->value);
         
+        UiVarEventData *event = malloc(sizeof(UiVarEventData));
+        event->obj = obj;
+        event->var = var;
+        event->observers = NULL;
+        event->callback = NULL;
+        event->userdata = NULL;
+        event->customint1 = 0;
+        event->customint2 = 0;
+        
         UiRadioButtonData *rbdata = malloc(sizeof(UiRadioButtonData));
-        rbdata->obj = obj;
-        rbdata->var = var;
+        rbdata->value = rgroup;
+        rbdata->eventdata = event;
         rbdata->first = first;
         
         g_signal_connect(
                 rbutton,
+                "toggled",
+                G_CALLBACK(ui_radio_obs),
+                event);
+        g_signal_connect(
+                rbutton,
                 "destroy",
                 G_CALLBACK(destroy_radiobutton),
                 rbdata);
     }
+    
+    if(args->onchange) {
+        UiEventData *event = malloc(sizeof(UiEventData));
+        event->obj = obj;
+        event->userdata = args->onchangedata;
+        event->callback = args->onchange;
+        event->value = 0;
+        event->customdata = NULL;
+        event->customint = 0;
         
-    g_signal_connect(
-            rbutton,
-            "toggled",
-            G_CALLBACK(radiobutton_toggled),
-            event);
-    g_signal_connect(
-            rbutton,
-            "destroy",
-            G_CALLBACK(ui_destroy_userdata),
-            event);
+        g_signal_connect(
+                rbutton,
+                "toggled",
+                G_CALLBACK(radiobutton_toggled),
+                event);
+        g_signal_connect(
+                rbutton,
+                "destroy",
+                G_CALLBACK(ui_destroy_userdata),
+                event);
+    }
     
     UiContainerPrivate *ct = (UiContainerPrivate*)obj->container_end;
     UiLayout layout = UI_ARGS2LAYOUT(args);
@@ -619,6 +625,20 @@
     return rbutton;
 }
 
+void ui_radio_obs(GtkToggleButton *widget, UiVarEventData *event) {
+    UiInteger *i = event->var->value;
+    
+    UiEvent e;
+    e.obj = event->obj;
+    e.window = event->obj->window;
+    e.document = event->obj->ctx->document;
+    e.eventdata = NULL;
+    e.eventdatatype = 0;
+    e.intval = i->get(i);
+    
+    ui_notify_evt(i->observers, &e);
+}
+
 #if GTK_MAJOR_VERSION >= 4
 int64_t ui_radiobutton_get(UiInteger *value) {
     int selection = 0;