diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 3dc78f2..c2ca830 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -1987,8 +1987,8 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
 	 *params = att->Texture->Name;
       }
       else {
-	 _mesa_error(ctx, GL_INVALID_ENUM,
-		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+         assert(att->Type == GL_NONE);
+         *params = 0;
       }
       return;
    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT: