diff --git a/src/newgrf_industries.h b/src/newgrf_industries.h
--- a/src/newgrf_industries.h
+++ b/src/newgrf_industries.h
@@ -34,10 +34,10 @@ struct IndustriesScopeResolver : public 
 	{
 	}
 
-	/* virtual */ uint32 GetRandomBits() const;
-	/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
-	/* virtual */ uint32 GetTriggers() const;
-	/* virtual */ void StorePSA(uint pos, int32 value);
+	uint32 GetRandomBits() const override;
+	uint32 GetVariable(byte variable, uint32 parameter, bool *available) const override;
+	uint32 GetTriggers() const override;
+	void StorePSA(uint pos, int32 value) override;
 };
 
 /** Resolver for industries. */
@@ -51,7 +51,7 @@ struct IndustriesResolverObject : public
 
 	TownScopeResolver *GetTown();
 
-	/* 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 &industries_scope;