diff --git a/sys/fs/smbfs/smbfs_smb.c b/sys/fs/smbfs/smbfs_smb.c
index 3a21ad29cf9..97f5921f7d1 100644
--- a/sys/fs/smbfs/smbfs_smb.c
+++ b/sys/fs/smbfs/smbfs_smb.c
@@ -363,7 +363,7 @@ smb_smb_flush(struct smbnode *np, struct smb_cred *scred)
 	struct mbchain *mbp;
 	int error;
 
-	if ((np->n_flag & NOPEN) != 0 || !SMBTOV(np) ||
+	if ((np->n_flag & NOPEN) == 0 || !SMBTOV(np) ||
 	    SMBTOV(np)->v_type != VREG)
 		return 0; /* not a regular open file */
 	error = smb_rq_init(rqp, SSTOCP(ssp), SMB_COM_FLUSH, scred);