diff --git a/boards/sim/sim/sim/configs/nsh/defconfig b/boards/sim/sim/sim/configs/nsh/defconfig
index f139a7a978..8321d62c39 100644
--- a/boards/sim/sim/sim/configs/nsh/defconfig
+++ b/boards/sim/sim/sim/configs/nsh/defconfig
@@ -64,6 +64,7 @@ CONFIG_SCHED_BACKTRACE=y
 CONFIG_SCHED_HAVE_PARENT=y
 CONFIG_SCHED_HPWORK=y
 CONFIG_SCHED_WAITPID=y
+CONFIG_SIM_WALLTIME_SIGNAL=y
 CONFIG_START_MONTH=6
 CONFIG_START_YEAR=2008
 CONFIG_SYSTEM_DUMPSTACK=y
diff --git a/boards/sim/sim/sim/configs/smp/defconfig b/boards/sim/sim/sim/configs/smp/defconfig
index 22a56da5e3..ef81c95ec3 100644
--- a/boards/sim/sim/sim/configs/smp/defconfig
+++ b/boards/sim/sim/sim/configs/smp/defconfig
@@ -25,6 +25,7 @@ CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_READLINE=y
 CONFIG_READLINE_CMD_HISTORY=y
 CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SIM_WALLTIME_SIGNAL=y
 CONFIG_SMP=y
 CONFIG_STACK_COLORATION=y
 CONFIG_SYSTEM_NSH=y