diff --git a/src/ActorFrame.cpp b/src/ActorFrame.cpp
index b54f223af9..309c9be1fe 100644
--- a/src/ActorFrame.cpp
+++ b/src/ActorFrame.cpp
@@ -624,7 +624,16 @@ public:
 	}
 	static int propagate( T* p, lua_State *L )			{ p->SetPropagateCommands( BIArg(1) ); COMMON_RETURN_SELF; }
 	static int fov( T* p, lua_State *L )				{ p->SetFOV( FArg(1) ); COMMON_RETURN_SELF; }
-	static int SetUpdateRate( T* p, lua_State *L )			{ p->SetUpdateRate( FArg(1) ); COMMON_RETURN_SELF; }
+	static int SetUpdateRate( T* p, lua_State *L )
+	{
+		float rate= FArg(1);
+		if(rate <= 0)
+		{
+			luaL_error(L, "ActorFrame:SetUpdateRate(%f) Update rate must be greater than 0.", rate);
+		}
+		p->SetUpdateRate(rate);
+		COMMON_RETURN_SELF;
+	}
 	DEFINE_METHOD(GetUpdateRate, GetUpdateRate());
 	static int SetFOV( T* p, lua_State *L )				{ p->SetFOV( FArg(1) ); COMMON_RETURN_SELF; }
 	static int vanishpoint( T* p, lua_State *L )			{ p->SetVanishPoint( FArg(1), FArg(2) ); COMMON_RETURN_SELF; }
diff --git a/src/ActorFrame.h b/src/ActorFrame.h
index 274da11ba4..bee6935b22 100644
--- a/src/ActorFrame.h
+++ b/src/ActorFrame.h
@@ -75,7 +75,7 @@ public:
 	virtual void FinishTweening();
 	virtual void HurryTweening( float factor );
 
-	void SetUpdateRate( float fUpdateRate ) { m_fUpdateRate = fUpdateRate; }
+	void SetUpdateRate(float rate) { if(rate > 0.0f) { m_fUpdateRate = rate; }}
 	float GetUpdateRate() { return m_fUpdateRate; }
 	void SetFOV( float fFOV ) { m_fFOV = fFOV; }
 	void SetVanishPoint( float fX, float fY) { m_fVanishX = fX; m_fVanishY = fY; }