diff --git a/audio/playtone/Makefile b/audio/playtone/Makefile
index ead4ea6..7c8e374 100644
--- a/audio/playtone/Makefile
+++ b/audio/playtone/Makefile
@@ -39,7 +39,7 @@ EXEFS_SRC   :=  exefs_src
 #---------------------------------------------------------------------------------
 # options for code generation
 #---------------------------------------------------------------------------------
-ARCH    :=  -march=armv8-a -mtp=soft -fPIE
+ARCH    :=  -march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIE
 
 CFLAGS  :=  -g -Wall -O2 \
             -ffast-math \