diff --git a/samples/subsys/mgmt/mcumgr/smp_svr/overlay-fs.conf b/samples/subsys/mgmt/mcumgr/smp_svr/overlay-fs.conf
index dd5cf45945a..2acb7e83971 100644
--- a/samples/subsys/mgmt/mcumgr/smp_svr/overlay-fs.conf
+++ b/samples/subsys/mgmt/mcumgr/smp_svr/overlay-fs.conf
@@ -1,4 +1,5 @@
 # Enable the LittleFS file system.
+CONFIG_FLASH_MAP=y
 CONFIG_FILE_SYSTEM=y
 CONFIG_FILE_SYSTEM_LITTLEFS=y