diff --git a/stepmania/src/ModsGroup.cpp b/stepmania/src/ModsGroup.cpp
index d7be9b1f69..197717e34a 100644
--- a/stepmania/src/ModsGroup.cpp
+++ b/stepmania/src/ModsGroup.cpp
@@ -8,6 +8,7 @@ static const char *ModsLevelNames[] = {
 	"Stage",
 	"Song",
 };
+XToString2( ModsLevel );
 LuaXType( ModsLevel );
 
 /*
diff --git a/stepmania/src/Tween.cpp b/stepmania/src/Tween.cpp
index bc559da24f..ac0c88f38e 100644
--- a/stepmania/src/Tween.cpp
+++ b/stepmania/src/Tween.cpp
@@ -12,6 +12,7 @@ static const char *TweenTypeNames[] = {
 	"Spring",
 	"Bezier"
 };
+XToString2( TweenType );
 LuaXType( TweenType );