diff --git a/ag.cc b/ag.cc
index abccd25..b0535dc 100644
--- a/ag.cc
+++ b/ag.cc
@@ -1668,7 +1668,7 @@ fail:
                 Engine::Quad * q = getQuad(L, 1);
                 if (q != NULL)
                 {
-                    q->setBlending(lua_tonumber(L, 2));
+                    q->setOffset(lua_tonumber(L, 2));
                 }
             }
             return 0;
diff --git a/tests/managed_objects.lua b/tests/managed_objects.lua
index fc220d0..b7effa6 100644
--- a/tests/managed_objects.lua
+++ b/tests/managed_objects.lua
@@ -57,6 +57,9 @@ function key_down_event(key)
         -- box:setPosition(x, y, 2)
     elseif (key == "minus") then
         ag.setCursorVisible(not ag.getCursorVisible())
+    elseif (key == "d") then
+        q = ag.createQuad(3, 3, 0, 1, 0, 0, 0, 1, 0)
+        q:setOffset(1)
     end
 end
 
@@ -85,7 +88,7 @@ function update_overlay_event(width, height)
     ag.drawPoint(1, 0, 1, 0, width-1, height-1)
     ag.drawPoint(1, 0, 1, 1, -1, -1)
     ag.drawPoint(1, 0, 1, 1, width, height)
-    msg = "b a s r - m1 m3"
+    msg = "b a s r d - m1 m3"
     tw, th = ag.getTextSize(msg, 14)
     ag.drawText(msg, 1, 1, 1, 14, width / 2 - tw / 2, 10)
 end