diff --git a/src/newgrf_industrytiles.h b/src/newgrf_industrytiles.h
--- a/src/newgrf_industrytiles.h
+++ b/src/newgrf_industrytiles.h
@@ -32,9 +32,9 @@ struct IndustryTileScopeResolver : publi
 	{
 	}
 
-	/* virtual */ uint32 GetRandomBits() const;
-	/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
-	/* virtual */ uint32 GetTriggers() const;
+	uint32 GetRandomBits() const override;
+	uint32 GetVariable(byte variable, uint32 parameter, bool *available) const override;
+	uint32 GetTriggers() const override;
 };
 
 /** Resolver for industry tiles. */
@@ -45,7 +45,7 @@ struct IndustryTileResolverObject : publ
 	IndustryTileResolverObject(IndustryGfx gfx, TileIndex tile, Industry *indus,
 			CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
 
-	/* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
+	ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) override
 	{
 		switch (scope) {
 			case VSG_SCOPE_SELF: return &indtile_scope;