diff --git a/src/newgrf_roadtype.h b/src/newgrf_roadtype.h
--- a/src/newgrf_roadtype.h
+++ b/src/newgrf_roadtype.h
@@ -40,8 +40,6 @@ struct RoadTypeResolverObject : public R
 		}
 	}
 
-	const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const override;
-
 	GrfSpecFeature GetFeature() const override;
 	uint32 GetDebugID() const override;
 };