diff --git a/resources/systems/macos/es_systems.xml b/resources/systems/macos/es_systems.xml
index 6a62a91fc..f8c899a87 100644
--- a/resources/systems/macos/es_systems.xml
+++ b/resources/systems/macos/es_systems.xml
@@ -846,8 +846,8 @@
mugen
M.U.G.E.N Game Engine
%ROMPATH%/mugen
- .7z .7Z .zip .ZIP
- PLACEHOLDER %ROM%
+ .mugen
+ %STARTDIR%=%GAMEDIR% %EMULATOR_OS-SHELL% -c "%ROM%"
mugen
mugen
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index 04e5ee959..d43befe45 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -861,8 +861,8 @@
mugen
M.U.G.E.N Game Engine
%ROMPATH%/mugen
- .7z .7Z .zip .ZIP
- PLACEHOLDER %ROM%
+ .mugen
+ %STARTDIR%=%GAMEDIR% %EMULATOR_OS-SHELL% -c "%ROM%"
mugen
mugen
diff --git a/resources/systems/windows/es_systems.xml b/resources/systems/windows/es_systems.xml
index c0a76c05c..61d569808 100644
--- a/resources/systems/windows/es_systems.xml
+++ b/resources/systems/windows/es_systems.xml
@@ -865,7 +865,7 @@
M.U.G.E.N Game Engine
%ROMPATH%\mugen
.lnk .LNK
- %HIDEWINDOW% %ESCAPESPECIALS% %STARTDIR%=%GAMEDIR% %EMULATOR_OS-SHELL% /C %ROM%
+ %HIDEWINDOW% %ESCAPESPECIALS% %STARTDIR%=%GAMEDIR% %EMULATOR_OS-SHELL% /C %ROM%
mugen
mugen