diff --git a/src/gui/dialogs/gamestate_inspector.cpp b/src/gui/dialogs/gamestate_inspector.cpp
index 5be474c1d040..a64c1befe723 100644
--- a/src/gui/dialogs/gamestate_inspector.cpp
+++ b/src/gui/dialogs/gamestate_inspector.cpp
@@ -128,6 +128,7 @@ class tgamestate_inspector::model
 		, inspect()
 		, inspector_name()
 		, copy_button()
+		, lua_button()
 	{
 		name = cfg["name"].str();
 	}