diff --git a/package/samba4/samba4.mk b/package/samba4/samba4.mk
index 69f4ad26e5..c612ac23ba 100644
--- a/package/samba4/samba4.mk
+++ b/package/samba4/samba4.mk
@@ -13,7 +13,7 @@ SAMBA4_LICENSE_FILES = COPYING
 SAMBA4_CPE_ID_VENDOR = samba
 SAMBA4_CPE_ID_PRODUCT = samba
 SAMBA4_DEPENDENCIES = \
-	host-e2fsprogs host-heimdal host-nfs-utils \
+	host-e2fsprogs host-flex host-heimdal host-nfs-utils \
 	host-perl host-perl-parse-yapp host-python3 \
 	cmocka e2fsprogs gnutls popt zlib \
 	$(if $(BR2_PACKAGE_LIBAIO),libaio) \