diff --git a/Makefile.libretro b/Makefile.libretro
index 642f6bb..e265ab3 100644
--- a/Makefile.libretro
+++ b/Makefile.libretro
@@ -250,6 +250,7 @@ LD   = "$(MSVCBINDIRPREFIX)/lib.exe"
 
 export INCLUDE := $(XDK)/xbox/include
 export LIB := $(XDK)/xbox/lib
+ENDIANNESS_DEFINES := -DLSB_FIRST -DBYTE_ORDER=LITTLE_ENDIAN
 PSS_STYLE :=2
 CFLAGS   += -D_XBOX -D_XBOX1
 CXXFLAGS += -D_XBOX -D_XBOX1