diff --git a/nx/Makefile b/nx/Makefile
index 57d1a81d..8911dfa5 100644
--- a/nx/Makefile
+++ b/nx/Makefile
@@ -31,7 +31,7 @@ INCLUDES	:=	include
 #---------------------------------------------------------------------------------
 # options for code generation
 #---------------------------------------------------------------------------------
-ARCH	:=	-march=armv8-a -mtp=soft -fPIC -ftls-model=local-exec
+ARCH	:=	-march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIC -ftls-model=local-exec
 
 CFLAGS	:=	-g -Wall -Werror \
 			-ffunction-sections \