diff --git a/Aquaria/Avatar.cpp b/Aquaria/Avatar.cpp
index 6a3990f..ea5856e 100644
--- a/Aquaria/Avatar.cpp
+++ b/Aquaria/Avatar.cpp
@@ -1426,7 +1426,7 @@ void Avatar::openSingingInterface()
 			//core->setMousePosition(Vector(400,300));
 		}
 
-		core->setMouseConstraintCircle(singingInterfaceRadius);
+		core->setMouseConstraintCircle(core->center, singingInterfaceRadius);
 		stopRoll();
 		singing = true;
 		currentSongIdx = SONG_NONE;
diff --git a/Aquaria/ScriptInterface.cpp b/Aquaria/ScriptInterface.cpp
index 7a86a10..44197f6 100644
--- a/Aquaria/ScriptInterface.cpp
+++ b/Aquaria/ScriptInterface.cpp
@@ -8060,6 +8060,18 @@ luaFunc(getMouseWheelChange)
 	luaReturnNum(core->mouse.scrollWheelChange);
 }
 
+luaFunc(setMouseConstraintCircle)
+{
+	core->setMouseConstraintCircle(Vector(lua_tonumber(L, 1), lua_tonumber(L, 2)), lua_tonumber(L, 3));
+	luaReturnNil();
+}
+
+luaFunc(setMouseConstraint)
+{
+	core->setMouseConstraint(getBool(L, 1));
+	luaReturnNil();
+}
+
 luaFunc(fade)
 {
 	dsq->overlay->color.interpolateTo(Vector(lua_tonumber(L, 3), lua_tonumber(L, 4), lua_tonumber(L, 5)), lua_tonumber(L, 6));
@@ -9114,6 +9126,8 @@ static const struct {
 	luaRegister(getMousePos),
 	luaRegister(getMouseWorldPos),
 	luaRegister(getMouseWheelChange),
+	luaRegister(setMouseConstraintCircle),
+	luaRegister(setMouseConstraint),
 
 	luaRegister(resetContinuity),
 
diff --git a/BBGE/Core.cpp b/BBGE/Core.cpp
index ac0f4dd..459ceb3 100644
--- a/BBGE/Core.cpp
+++ b/BBGE/Core.cpp
@@ -3296,10 +3296,12 @@ void Core::setMouseConstraint(bool on)
 	mouseConstraint = on;
 }
 
-void Core::setMouseConstraintCircle(float circle)
+void Core::setMouseConstraintCircle(const Vector& pos, float circle)
 {
 	mouseConstraint = true;
 	mouseCircle = circle;
+	mouseConstraintCenter = pos;
+	mouseConstraintCenter.z = 0;
 }
 
 /*
@@ -3333,7 +3335,7 @@ bool Core::doMouseConstraint()
 	{
 		//- core->getVirtualOffX()
 		//- virtualOffX
-		Vector h = Vector(core->center.x , core->center.y);
+		Vector h = mouseConstraintCenter;
 		Vector d = mouse.position - h;
 		if (!d.isLength2DIn(mouseCircle))
 		{
diff --git a/BBGE/Core.h b/BBGE/Core.h
index da4e73e..55d2233 100644
--- a/BBGE/Core.h
+++ b/BBGE/Core.h
@@ -1037,7 +1037,7 @@ public:
 	void removeRenderObject(RenderObject *r, RemoveRenderObjectFlag flag = DESTROY_RENDER_OBJECT);
 
 	void setMouseConstraint(bool on);
-	void setMouseConstraintCircle(float mouseCircle);
+	void setMouseConstraintCircle(const Vector& pos, float mouseCircle);
 	
 	void setReentryInputGrab(int on);
 	
@@ -1350,6 +1350,7 @@ protected:
 	std::string appName;
 	bool mouseConstraint;
 	float mouseCircle;
+	Vector mouseConstraintCenter;
 	
 	bool doMouseConstraint();