diff --git a/stepmania/src/Actor.h b/stepmania/src/Actor.h
index 336c0f06b2..b8c20e2282 100644
--- a/stepmania/src/Actor.h
+++ b/stepmania/src/Actor.h
@@ -497,21 +497,21 @@ public:
 	static int effectmagnitude( T* p, lua_State *L )	{ p->SetEffectMagnitude( RageVector3(FArg(1),FArg(2),FArg(3)) ); return 0; }
 	static int scaletocover( T* p, lua_State *L )		{ p->ScaleToCover( RectF(FArg(1), FArg(2), FArg(3), FArg(4)) ); return 0; }
 	static int scaletofit( T* p, lua_State *L )			{ p->ScaleToFitInside( RectF(FArg(1), FArg(2), FArg(3), FArg(4)) ); return 0; }
-	static int animate( T* p, lua_State *L )			{ p->EnableAnimation(BArg(1)); return 0; }
+	static int animate( T* p, lua_State *L )			{ p->EnableAnimation(!!IArg(1)); return 0; }
 	static int play( T* p, lua_State *L )				{ p->EnableAnimation(true); return 0; }
 	static int pause( T* p, lua_State *L )				{ p->EnableAnimation(false); return 0; }
 	static int setstate( T* p, lua_State *L )			{ p->SetState(IArg(1)); return 0; }
-	static int texturewrapping( T* p, lua_State *L )	{ p->SetTextureWrapping(BArg(1)); return 0; }
-	static int additiveblend( T* p, lua_State *L )		{ p->SetBlendMode(BArg(1) ? BLEND_ADD : BLEND_NORMAL); return 0; }
+	static int texturewrapping( T* p, lua_State *L )	{ p->SetTextureWrapping(!!IArg(1)); return 0; }
+	static int additiveblend( T* p, lua_State *L )		{ p->SetBlendMode(!!IArg(1) ? BLEND_ADD : BLEND_NORMAL); return 0; }
 	static int blend( T* p, lua_State *L )				{ p->SetBlendModeString(SArg(1)); return 0; }
-	static int zbuffer( T* p, lua_State *L )			{ p->SetUseZBuffer(BArg(1)); return 0; }
-	static int ztest( T* p, lua_State *L )				{ p->SetZTestMode(BArg(1)?ZTEST_WRITE_ON_PASS:ZTEST_OFF); return 0; }
+	static int zbuffer( T* p, lua_State *L )			{ p->SetUseZBuffer(!!IArg(1)); return 0; }
+	static int ztest( T* p, lua_State *L )				{ p->SetZTestMode((!!IArg(1))?ZTEST_WRITE_ON_PASS:ZTEST_OFF); return 0; }
 	static int ztestmode( T* p, lua_State *L )			{ p->SetZTestModeString(SArg(1)); return 0; }
-	static int zwrite( T* p, lua_State *L )				{ p->SetZWrite(BArg(1)); return 0; }
-	static int clearzbuffer( T* p, lua_State *L )		{ p->SetClearZBuffer(BArg(1)); return 0; }
-	static int backfacecull( T* p, lua_State *L )		{ p->SetCullMode(BArg(1) ? CULL_BACK : CULL_NONE); return 0; }
+	static int zwrite( T* p, lua_State *L )				{ p->SetZWrite(!!IArg(1)); return 0; }
+	static int clearzbuffer( T* p, lua_State *L )		{ p->SetClearZBuffer(!!IArg(1)); return 0; }
+	static int backfacecull( T* p, lua_State *L )		{ p->SetCullMode((!!IArg(1)) ? CULL_BACK : CULL_NONE); return 0; }
 	static int cullmode( T* p, lua_State *L )			{ p->SetCullModeString(SArg(1)); return 0; }
-	static int hidden( T* p, lua_State *L )				{ p->SetHidden(BArg(1)); return 0; }
+	static int hidden( T* p, lua_State *L )				{ p->SetHidden(!!IArg(1)); return 0; }
 	static int hibernate( T* p, lua_State *L )			{ p->SetHibernate(FArg(1)); return 0; }
 	static int draworder( T* p, lua_State *L )			{ p->SetDrawOrder(IArg(1)); return 0; }
 	static int playcommand( T* p, lua_State *L )		{ p->PlayCommand(SArg(1)); return 0; }
diff --git a/stepmania/src/ActorFrame.h b/stepmania/src/ActorFrame.h
index e62e197886..2b68038692 100644
--- a/stepmania/src/ActorFrame.h
+++ b/stepmania/src/ActorFrame.h
@@ -11,7 +11,7 @@ class LunaActorFrame : public LunaActor<T>
 public:
 	LunaActorFrame() { LUA->Register( Register ); }
 
-	static int propagate( T* p, lua_State *L )	{ p->SetPropagateCommands( BArg(1) ); return 0; }
+	static int propagate( T* p, lua_State *L )	{ p->SetPropagateCommands( !!IArg(1) ); return 0; }
 
 	static void Register(lua_State *L) 
 	{
diff --git a/stepmania/src/LuaBinding.h b/stepmania/src/LuaBinding.h
index f03dbab9d0..f109b94bc3 100644
--- a/stepmania/src/LuaBinding.h
+++ b/stepmania/src/LuaBinding.h
@@ -14,10 +14,15 @@ extern "C"
 #include "LuaManager.h"
 #include <vector>
 
+inline bool MyLua_checkboolean (lua_State *L, int numArg)
+{
+	luaL_checktype(L,numArg,LUA_TBOOLEAN);
+	return !!lua_toboolean(L,numArg);
+}
 
 #define SArg(n) (luaL_checkstring(L,n))
 #define IArg(n) (luaL_checkint(L,n))
-#define BArg(n) (!!IArg(n))
+#define BArg(n) (MyLua_checkboolean(L,n))
 #define FArg(n) ((float) luaL_checknumber(L,n))
 
 
diff --git a/stepmania/src/Sprite.h b/stepmania/src/Sprite.h
index a5e0ac9075..6f6ce42d0f 100644
--- a/stepmania/src/Sprite.h
+++ b/stepmania/src/Sprite.h
@@ -25,7 +25,7 @@ public:
 	 * We'd need to break the command helpers into a separate function; RageTexture
 	 * shouldn't depend on Actor. */
 	static int position( T* p, lua_State *L )			{ p->SetPosition(FArg(1)); return 0; }
-	static int loop( T* p, lua_State *L )				{ p->SetLooping(BArg(1)); return 0; }
+	static int loop( T* p, lua_State *L )				{ p->SetLooping(!!IArg(1)); return 0; }
 	static int rate( T* p, lua_State *L )				{ p->SetPlaybackRate(FArg(1)); return 0; }
 
 	static void Register(lua_State *L) {