diff --git a/samples/subsys/mgmt/mcumgr/smp_svr/prj.conf b/samples/subsys/mgmt/mcumgr/smp_svr/prj.conf
index cfde2d6b833..2e81ff1a317 100644
--- a/samples/subsys/mgmt/mcumgr/smp_svr/prj.conf
+++ b/samples/subsys/mgmt/mcumgr/smp_svr/prj.conf
@@ -3,6 +3,7 @@ CONFIG_MCUMGR=y
 
 # Some command handlers require a large stack.
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2304
+CONFIG_MAIN_STACK_SIZE=2048
 
 # Ensure an MCUboot-compatible binary is generated.
 CONFIG_BOOTLOADER_MCUBOOT=y