diff --git a/samples/net/echo_client/prj_frdm_k64f_cc2520.conf b/samples/net/echo_client/prj_frdm_k64f_cc2520.conf
index be1ed091240..dce83b647c2 100644
--- a/samples/net/echo_client/prj_frdm_k64f_cc2520.conf
+++ b/samples/net/echo_client/prj_frdm_k64f_cc2520.conf
@@ -38,7 +38,6 @@ CONFIG_SPI_0=y
 CONFIG_SYS_LOG_SPI_LEVEL=1
 
 CONFIG_IEEE802154_CC2520=y
-CONFIG_IEEE802154_CC2520_AUTO_ACK=y
 CONFIG_SYS_LOG_IEEE802154_DRIVER_LEVEL=1
 CONFIG_IEEE802154_CC2520_SPI_DRV_NAME="SPI_0"
 CONFIG_IEEE802154_CC2520_SPI_FREQ=4000000
diff --git a/samples/net/echo_server/prj_frdm_k64f_cc2520.conf b/samples/net/echo_server/prj_frdm_k64f_cc2520.conf
index 0281056edd1..d55749356f3 100644
--- a/samples/net/echo_server/prj_frdm_k64f_cc2520.conf
+++ b/samples/net/echo_server/prj_frdm_k64f_cc2520.conf
@@ -38,7 +38,6 @@ CONFIG_SPI_0=y
 CONFIG_SYS_LOG_SPI_LEVEL=1
 
 CONFIG_IEEE802154_CC2520=y
-CONFIG_IEEE802154_CC2520_AUTO_ACK=y
 CONFIG_SYS_LOG_IEEE802154_DRIVER_LEVEL=1
 CONFIG_IEEE802154_CC2520_SPI_DRV_NAME="SPI_0"
 CONFIG_IEEE802154_CC2520_SPI_FREQ=4000000
diff --git a/tests/net/ieee802154/crypto/prj.conf b/tests/net/ieee802154/crypto/prj.conf
index ab0889a2512..6ebbff99b69 100644
--- a/tests/net/ieee802154/crypto/prj.conf
+++ b/tests/net/ieee802154/crypto/prj.conf
@@ -35,7 +35,6 @@ CONFIG_NET_DEBUG_L2_IEEE802154=y
 CONFIG_NET_L2_IEEE802154_RFD=y
 
 CONFIG_IEEE802154_CC2520=y
-CONFIG_IEEE802154_CC2520_AUTO_ACK=y
 CONFIG_SYS_LOG_IEEE802154_DRIVER_LEVEL=4
 
 CONFIG_NET_L2_IEEE802154_SHELL=y