diff --git a/src/frontend/mame/ui/utils.cpp b/src/frontend/mame/ui/utils.cpp
index 5bd6c6cfe1f..ccc8ee34892 100644
--- a/src/frontend/mame/ui/utils.cpp
+++ b/src/frontend/mame/ui/utils.cpp
@@ -745,7 +745,7 @@ template <template <machine_filter::type T> class Base, machine_filter::type Typ
 class inverted_machine_filter : public Base<Type>
 {
 public:
-	using Base<Type>::Base;
+	inverted_machine_filter(char const *value, emu_file *file, unsigned indent) : Base<Type>(value, file, indent) { }
 
 	virtual bool apply(game_driver const &driver) const override { return !Base<Type>::apply(driver); }
 };
diff --git a/src/frontend/mame/ui/utils.h b/src/frontend/mame/ui/utils.h
index 7018007eaee..394bcc86244 100644
--- a/src/frontend/mame/ui/utils.h
+++ b/src/frontend/mame/ui/utils.h
@@ -272,7 +272,7 @@ enum
 	HOVER_RPANEL_ARROW,
 	HOVER_LPANEL_ARROW,
 	HOVER_FILTER_FIRST,
-	HOVER_FILTER_LAST = HOVER_FILTER_FIRST + std::max<unsigned>(ui::machine_filter::COUNT, ui::software_filter::COUNT),
+	HOVER_FILTER_LAST = HOVER_FILTER_FIRST + std::max<int>(ui::machine_filter::COUNT, ui::software_filter::COUNT),
 	HOVER_RP_FIRST,
 	HOVER_RP_LAST = HOVER_RP_FIRST + 1 + RP_LAST,
 	HOVER_INFO_TEXT