diff --git a/panel-plugin/xkb-config.c b/panel-plugin/xkb-config.c
index 2871d96..27fe3ab 100644
--- a/panel-plugin/xkb-config.c
+++ b/panel-plugin/xkb-config.c
@@ -260,7 +260,12 @@ static gint
 xkb_config_get_current_group (void)
 {
     XklState* state = xkl_engine_get_current_state (config->engine);
-    return state->group;
+    g_assert(state->group >= 0 && state->group < config->group_count);
+
+    if (G_LIKELY (state->group >= 0 && state->group < config->group_count))
+        return state->group;
+    else
+        return 0;
 }
 
 gboolean