diff --git a/packages/games/libretro/mame/patches/mame-missing-include.patch b/packages/games/libretro/mame/patches/mame-missing-include.patch
new file mode 100644
index 000000000..5847002d2
--- /dev/null
+++ b/packages/games/libretro/mame/patches/mame-missing-include.patch
@@ -0,0 +1,11 @@
+diff -rupN mame.orig/src/lib/netlist/plib/ppmf.h mame/src/lib/netlist/plib/ppmf.h
+--- mame.orig/src/lib/netlist/plib/ppmf.h	2022-07-04 11:02:16.563354243 -0400
++++ mame/src/lib/netlist/plib/ppmf.h	2022-07-04 11:03:01.483272032 -0400
+@@ -81,6 +81,7 @@ namespace plib {
+ #include "ptypes.h"
+ 
+ #include <algorithm>
++#include <cstddef> // ptrdiff_t
+ #include <cstdint> // uintptr_t
+ #include <type_traits>
+ #include <utility>