diff --git a/samples/subsys/mgmt/mcumgr/smp_svr/overlay-shell-mgmt.conf b/samples/subsys/mgmt/mcumgr/smp_svr/overlay-shell-mgmt.conf
index ae3836197c7..7f781a2cd2e 100644
--- a/samples/subsys/mgmt/mcumgr/smp_svr/overlay-shell-mgmt.conf
+++ b/samples/subsys/mgmt/mcumgr/smp_svr/overlay-shell-mgmt.conf
@@ -1,3 +1,4 @@
 # Enable shell commands.
 CONFIG_SHELL=y
+CONFIG_SHELL_BACKEND_SERIAL=n
 CONFIG_MCUMGR_CMD_SHELL_MGMT=y