diff --git a/resources/systems/macos/es_systems.xml b/resources/systems/macos/es_systems.xml
index f63c86c2b..7923f7a82 100644
--- a/resources/systems/macos/es_systems.xml
+++ b/resources/systems/macos/es_systems.xml
@@ -1058,7 +1058,7 @@
         <name>pc98</name>
         <fullname>NEC PC-9800 Series</fullname>
         <path>%ROMPATH%/pc98</path>
-        <extension>.2hd .2HD .88d .88D .98d .98D .d88 .D88 .d98 .D98 .cmd .CMD .dup .DUP .fdd .FDD .fdi .FDI .hdd .HDD .hdi .HDI .hdm .HDM .hdn .HDN .nhd .NHD .tfd .TFD .thd .THD . xdf .XDF .7z .7Z .zip .ZIP</extension>
+        <extension>.2hd .2HD .88d .88D .98d .98D .d88 .D88 .d98 .D98 .cmd .CMD .dup .DUP .fdd .FDD .fdi .FDI .hdd .HDD .hdi .HDI .hdm .HDM .hdn .HDN .m3u .M3U .nhd .NHD .tfd .TFD .thd .THD . xdf .XDF .7z .7Z .zip .ZIP</extension>
         <command label="Neko Project II Kai">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/np2kai_libretro.dylib %ROM%</command>
         <command label="Neko Project II">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/nekop2_libretro.dylib %ROM%</command>
         <platform>pc98</platform>
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index ad167a5e0..d9ab8b558 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -1094,7 +1094,7 @@
         <name>pc98</name>
         <fullname>NEC PC-9800 Series</fullname>
         <path>%ROMPATH%/pc98</path>
-        <extension>.2hd .2HD .88d .88D .98d .98D .d88 .D88 .d98 .D98 .cmd .CMD .dup .DUP .fdd .FDD .fdi .FDI .hdd .HDD .hdi .HDI .hdm .HDM .hdn .HDN .nhd .NHD .tfd .TFD .thd .THD . xdf .XDF .7z .7Z .zip .ZIP</extension>
+        <extension>.2hd .2HD .88d .88D .98d .98D .d88 .D88 .d98 .D98 .cmd .CMD .dup .DUP .fdd .FDD .fdi .FDI .hdd .HDD .hdi .HDI .hdm .HDM .hdn .HDN .m3u .M3U .nhd .NHD .tfd .TFD .thd .THD . xdf .XDF .7z .7Z .zip .ZIP</extension>
         <command label="Neko Project II Kai">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/np2kai_libretro.so %ROM%</command>
         <command label="Neko Project II">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/nekop2_libretro.so %ROM%</command>
         <platform>pc98</platform>
diff --git a/resources/systems/windows/es_systems.xml b/resources/systems/windows/es_systems.xml
index 7b196e2af..b91bd655a 100644
--- a/resources/systems/windows/es_systems.xml
+++ b/resources/systems/windows/es_systems.xml
@@ -1095,7 +1095,7 @@
         <name>pc98</name>
         <fullname>NEC PC-9800 Series</fullname>
         <path>%ROMPATH%\pc98</path>
-        <extension>.2hd .2HD .88d .88D .98d .98D .d88 .D88 .d98 .D98 .cmd .CMD .dup .DUP .fdd .FDD .fdi .FDI .hdd .HDD .hdi .HDI .hdm .HDM .hdn .HDN .nhd .NHD .tfd .TFD .thd .THD . xdf .XDF .7z .7Z .zip .ZIP</extension>
+        <extension>.2hd .2HD .88d .88D .98d .98D .d88 .D88 .d98 .D98 .cmd .CMD .dup .DUP .fdd .FDD .fdi .FDI .hdd .HDD .hdi .HDI .hdm .HDM .hdn .HDN .m3u .M3U .nhd .NHD .tfd .TFD .thd .THD . xdf .XDF .7z .7Z .zip .ZIP</extension>
         <command label="Neko Project II Kai">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\np2kai_libretro.dll %ROM%</command>
         <command label="Neko Project II">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\nekop2_libretro.dll %ROM%</command>
         <platform>pc98</platform>