diff -ruN xrdp-0.9.16-v/common/arch.h xrdp-0.9.16/common/arch.h
--- xrdp-0.9.16-v/common/arch.h	2021-04-30 22:12:07.000000000 +1000
+++ xrdp-0.9.16/common/arch.h	2021-05-01 09:38:05.008987725 +1000
@@ -90,8 +90,6 @@
       defined(__s390__) || defined (__s390x__) || \
       defined(__riscv)
 #define NO_NEED_ALIGN
-#else
-#warning unknown arch
 #endif
 #endif