diff --git a/boards/sim/sim/sim/configs/nsh/defconfig b/boards/sim/sim/sim/configs/nsh/defconfig
index f2ec75f111a..9ac34ae2535 100644
--- a/boards/sim/sim/sim/configs/nsh/defconfig
+++ b/boards/sim/sim/sim/configs/nsh/defconfig
@@ -27,6 +27,7 @@ CONFIG_FSUTILS_PASSWD_READONLY=y
 CONFIG_FS_BINFS=y
 CONFIG_FS_FAT=y
 CONFIG_FS_PROCFS=y
+CONFIG_FS_RAMMAP=y
 CONFIG_FS_ROMFS=y
 CONFIG_IDLETHREAD_STACKSIZE=4096
 CONFIG_LIBC_EXECFUNCS=y