diff --git a/pkgs/applications/emulators/libretro/cores/fmsx.nix b/pkgs/applications/emulators/libretro/cores/fmsx.nix
index dc072c5108a3..cb3bb1e20f95 100644
--- a/pkgs/applications/emulators/libretro/cores/fmsx.nix
+++ b/pkgs/applications/emulators/libretro/cores/fmsx.nix
@@ -5,13 +5,13 @@
 }:
 mkLibretroCore {
   core = "fmsx";
-  version = "0-unstable-2025-07-31";
+  version = "0-unstable-2026-03-31";
 
   src = fetchFromGitHub {
     owner = "libretro";
     repo = "fmsx-libretro";
-    rev = "fbe4dfc4c3e3f7eb27089def3d663a905b181845";
-    hash = "sha256-1hZQO16SDB8n1wdTP67Kpns3izg/nPGl5M7wjFDBjGc=";
+    rev = "6b807c588d63677770f7f2ed8b94ca0e9da256ce";
+    hash = "sha256-vA9ODUtmmrDPbZjmRJ9IIFELLTD8g8aHmQdo/B/d1fQ=";
   };
 
   makefile = "Makefile";