diff --git a/src/newgrf_canal.cpp b/src/newgrf_canal.cpp
--- a/src/newgrf_canal.cpp
+++ b/src/newgrf_canal.cpp
@@ -49,8 +49,6 @@ struct CanalResolverObject : public Reso
 		}
 	}
 
-	const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const override;
-
 	GrfSpecFeature GetFeature() const override;
 	uint32 GetDebugID() const override;
 };
@@ -108,14 +106,6 @@ struct CanalResolverObject : public Reso
 	return UINT_MAX;
 }
 
-
-/* virtual */ const SpriteGroup *CanalResolverObject::ResolveReal(const RealSpriteGroup *group) const
-{
-	if (group->loaded.empty()) return nullptr;
-
-	return group->loaded[0];
-}
-
 GrfSpecFeature CanalResolverObject::GetFeature() const
 {
 	return GSF_CANALS;