diff --git a/resources/systems/windows/es_systems.xml b/resources/systems/windows/es_systems.xml
index 4041ee400..93f4e9809 100644
--- a/resources/systems/windows/es_systems.xml
+++ b/resources/systems/windows/es_systems.xml
@@ -1371,7 +1371,7 @@
         <name>wiiu</name>
         <fullname>Nintendo Wii U</fullname>
         <path>%ROMPATH%\wiiu</path>
-        <extension>.rpx .RPX</extension>
+        <extension>.rpx .RPX .wud .WUD .wux .WUX</extension>
         <command label="Cemu (Standalone)">%EMULATOR_CEMU% -f -g %ROM%</command>
         <platform>wiiu</platform>
         <theme>wiiu</theme>