diff --git a/src/gui/dialogs/multiplayer/faction_select.cpp b/src/gui/dialogs/multiplayer/faction_select.cpp
index 8f19be558698..5014fef73ad8 100644
--- a/src/gui/dialogs/multiplayer/faction_select.cpp
+++ b/src/gui/dialogs/multiplayer/faction_select.cpp
@@ -200,7 +200,7 @@ void faction_select::update_leader_image(window& window)
 	find_widget<image>(&window, "leader_image", false).set_label(leader_image);
 }
 
-void faction_select::post_show(window& window)
+void faction_select::post_show(window& /*window*/)
 {
 	//
 	// If we're canceling, restore the previous selections. It might be worth looking