diff --git a/sys/src/cmd/python/pyconfig.h b/sys/src/cmd/python/pyconfig.h
index a01ec73c9..f5c8f06fe 100644
--- a/sys/src/cmd/python/pyconfig.h
+++ b/sys/src/cmd/python/pyconfig.h
@@ -17,7 +17,7 @@
 
 typedef struct Threadarg Threadarg;
 
-#if defined(T386) || defined(Tarm) || defined(Tpower) || defined(Tamd64) || defined(Tspim)
+#if defined(T386) || defined(Tarm) || defined(Tarm64) || defined(Tpower) || defined(Tamd64) || defined(Tspim)
 #undef WORDS_BIGENDIAN
 #elif defined(Tmips) || defined(Tsparc)
 #define WORDS_BIGENDIAN