diff --git a/package/samba4/samba4-cache.txt b/package/samba4/samba4-cache.txt
index bd7c3654b4..75d0343dc9 100644
--- a/package/samba4/samba4-cache.txt
+++ b/package/samba4/samba4-cache.txt
@@ -42,3 +42,4 @@ checking for clnt_create(): OK
 Checking for a 64-bit host to support lmdb: NO
 Checking value of GNUTLS_CIPHER_AES_128_CFB8: 29
 Checking value of GNUTLS_MAC_AES_CMAC_128: 203
+Checking whether fcntl supports flags to send direct I/O availability signals: OK