diff --git a/src/modules/graphics/opengl/Graphics.cpp b/src/modules/graphics/opengl/Graphics.cpp
index 16fa606fb..4d75047e4 100644
--- a/src/modules/graphics/opengl/Graphics.cpp
+++ b/src/modules/graphics/opengl/Graphics.cpp
@@ -525,7 +525,7 @@ namespace opengl
 
 	void Graphics::setBackgroundColor(Color c)
 	{
-		glClearColor((float)c.r/255.0f, (float)c.g/255.0f, (float)c.b/255.0f, 1.0f);
+		glClearColor((float)c.r/255.0f, (float)c.g/255.0f, (float)c.b/255.0f, (float)c.a/255.0f);
 	}
 
 	Color Graphics::getBackgroundColor()
diff --git a/src/modules/graphics/opengl/wrap_Graphics.cpp b/src/modules/graphics/opengl/wrap_Graphics.cpp
index 31326bda9..3e0124986 100644
--- a/src/modules/graphics/opengl/wrap_Graphics.cpp
+++ b/src/modules/graphics/opengl/wrap_Graphics.cpp
@@ -386,14 +386,18 @@ namespace opengl
 			lua_gettable(L, -2);
 			c.b = (unsigned char)luaL_checkint(L, -1);
 			lua_pop(L, 1);
+			lua_pushinteger(L, 4);
+			lua_gettable(L, -2);
+			c.a = (unsigned char)luaL_optint(L, -1, 255);
+			lua_pop(L, 1);
 		}
 		else
 		{
 			c.r = (unsigned char)luaL_checkint(L, 1);
 			c.g = (unsigned char)luaL_checkint(L, 2);
 			c.b = (unsigned char)luaL_checkint(L, 3);
+			c.a = (unsigned char)luaL_optint(L, 4, 255);
 		}
-		c.a = 255;
 		instance->setBackgroundColor(c);
 		return 0;
 	}