1 files changed, 6 insertions, 0 deletions
diff --git a/src/lua5/cdlua5_canvas.c b/src/lua5/cdlua5_canvas.c
index 0ea9b1b..d6e9849 100644
--- a/src/lua5/cdlua5_canvas.c
+++ b/src/lua5/cdlua5_canvas.c
@@ -376,6 +376,12 @@ static int cdlua5_transform(lua_State *L)
   double matrix[6];
   int i;
 
+  if (lua_isnil(L, 2))
+  {
+    cdCanvasTransform(cdlua_checkcanvas(L, 1), NULL);
+    return 0;
+  }
+
   if (!lua_istable(L, 2))
     luaL_argerror(L, 2, "invalid matrix, must be a table");