diff --git a/conf/machine/raspberrypi3-64.conf b/conf/machine/raspberrypi3-64.conf
index 50dd533..b2d64a4 100644
--- a/conf/machine/raspberrypi3-64.conf
+++ b/conf/machine/raspberrypi3-64.conf
@@ -11,6 +11,7 @@ MACHINE_EXTRA_RRECOMMENDS += "\
     bluez-firmware-rpidistro-bcm4345c0-hcd \
 "
 
+DEFAULTTUNE ?= "cortexa53-nocrypto"
 require conf/machine/include/arm/armv8a/tune-cortexa53.inc
 include conf/machine/include/rpi-base.inc
 
diff --git a/conf/machine/raspberrypi4-64.conf b/conf/machine/raspberrypi4-64.conf
index 42ed4be..1d93772 100644
--- a/conf/machine/raspberrypi4-64.conf
+++ b/conf/machine/raspberrypi4-64.conf
@@ -12,6 +12,8 @@ MACHINE_EXTRA_RRECOMMENDS += "\
     bluez-firmware-rpidistro-bcm4345c5-hcd \
 "
 
+DEFAULTTUNE = "cortexa72-nocrypto"
+
 require conf/machine/include/arm/armv8a/tune-cortexa72.inc
 include conf/machine/include/rpi-base.inc