diff --git a/.gitmodules b/.gitmodules
index fb5a6cf42a..d95e2e5944 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -54,4 +54,4 @@
 [submodule "waterbox/mame-arcade/mame"]
 	path = waterbox/mame-arcade/mame
 	url = https://github.com/TASEmulators/mame.git
-	branch = mamehawk0249
+	branch = mamehawk0250
diff --git a/Assets/dll/libmamearcade.wbx.zst b/Assets/dll/libmamearcade.wbx.zst
old mode 100644
new mode 100755
index f9b480936a..3f72060a9a
Binary files a/Assets/dll/libmamearcade.wbx.zst and b/Assets/dll/libmamearcade.wbx.zst differ
diff --git a/src/BizHawk.Emulation.Cores/Arcades/MAME/MAME.cs b/src/BizHawk.Emulation.Cores/Arcades/MAME/MAME.cs
index 384655be91..1488d52233 100644
--- a/src/BizHawk.Emulation.Cores/Arcades/MAME/MAME.cs
+++ b/src/BizHawk.Emulation.Cores/Arcades/MAME/MAME.cs
@@ -14,7 +14,7 @@ using BizHawk.Emulation.Cores.Waterbox;
 
 namespace BizHawk.Emulation.Cores.Arcades.MAME
 {
-	[PortedCore(CoreNames.MAME, "MAMEDev", "0.249", "https://github.com/mamedev/mame.git", isReleased: false)]
+	[PortedCore(CoreNames.MAME, "MAMEDev", "0.250", "https://github.com/mamedev/mame.git", isReleased: false)]
 	public partial class MAME : IRomInfo
 	{
 		[CoreConstructor(VSystemID.Raw.Arcade)]
diff --git a/waterbox/mame-arcade/mame b/waterbox/mame-arcade/mame
index d88189243d..9fced86213 160000
--- a/waterbox/mame-arcade/mame
+++ b/waterbox/mame-arcade/mame
@@ -1 +1 @@
-Subproject commit d88189243da9ee6547a84fab2d7e489a32595e56
+Subproject commit 9fced86213548ec78e713ab1574381d0569ac6da