--- goocanvas-1.2.6/ext/goocanvas/rbgoocanvasimage.c.pixbuf	2017-01-30 22:19:04.819778236 +0900
+++ goocanvas-1.2.6/ext/goocanvas/rbgoocanvasimage.c	2017-01-30 22:21:09.365810055 +0900
@@ -23,6 +23,10 @@
 
 #define RG_TARGET_NAMESPACE cCanvasImage
 
+#ifndef RVAL2GDKPIXBUF
+#define RVAL2GDKPIXBUF(o) (GDK_PIXBUF(RVAL2GOBJ(o)))
+#endif
+
 static VALUE
 rg_initialize(VALUE self, VALUE parent, VALUE pixbuf,
                         VALUE x, VALUE y)