diff --git a/samples/bluetooth/hci_pwr_ctrl/prj.conf b/samples/bluetooth/hci_pwr_ctrl/prj.conf
index a562348889b7a2..268cb770c463ab 100644
--- a/samples/bluetooth/hci_pwr_ctrl/prj.conf
+++ b/samples/bluetooth/hci_pwr_ctrl/prj.conf
@@ -1,7 +1,6 @@
 CONFIG_BT=y
 CONFIG_BT_DEBUG_LOG=y
 CONFIG_BT_PERIPHERAL=y
-CONFIG_MAIN_STACK_SIZE=512
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=768
 CONFIG_BT_HRS=y
 CONFIG_BT_DEVICE_APPEARANCE=833
diff --git a/samples/bluetooth/hci_uart/prj.conf b/samples/bluetooth/hci_uart/prj.conf
index 877f745c80ea63..e5cb75ac991972 100644
--- a/samples/bluetooth/hci_uart/prj.conf
+++ b/samples/bluetooth/hci_uart/prj.conf
@@ -15,5 +15,4 @@ CONFIG_BT_MAX_CONN=16
 CONFIG_BT_TINYCRYPT_ECC=n
 CONFIG_BT_CTLR_DTM_HCI=y
 
-CONFIG_MAIN_STACK_SIZE=1024
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=512