diff --git a/src/Backends/Platform/WiiU.cpp b/src/Backends/Platform/WiiU.cpp
index f18be654..db2aeb0b 100644
--- a/src/Backends/Platform/WiiU.cpp
+++ b/src/Backends/Platform/WiiU.cpp
@@ -1,6 +1,7 @@
 #include "../Misc.h"
 
 #include <stdarg.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <string>