diff --git a/src/memline.c b/src/memline.c
index ea6571c..8f6c0e0 100644
--- a/src/memline.c
+++ b/src/memline.c
@@ -4914,7 +4914,7 @@
 	 * block for the salt. */
 	vim_snprintf((char *)salt, sizeof(salt), "%ld", (long)offset);
 	bf_key_init(key, salt, (int)STRLEN(salt));
-	bf_ofb_init(seed, MF_SEED_LEN);
+	bf_cfb_init(seed, MF_SEED_LEN);
     }
 }