diff --git a/fs/littlefs/Make.defs b/fs/littlefs/Make.defs
index b922eb5353..560a674d27 100644
--- a/fs/littlefs/Make.defs
+++ b/fs/littlefs/Make.defs
@@ -37,6 +37,7 @@ CFLAGS += -DLFS_WARN=fwarn
 CFLAGS += -DLFS_ERROR=ferr
 CFLAGS += -DLFS_ASSERT=DEBUGASSERT
 CFLAGS += -DLFS_CONFIG=../lfs_vfs.h
+CFLAGS += -DLFS_NAME_MAX=$(CONFIG_NAME_MAX)
 
 LITTLEFS_VERSION ?= 2.4.0
 LITTLEFS_TARBALL = v$(LITTLEFS_VERSION).tar.gz