diff --git a/builtin/blame.c b/builtin/blame.c
index de89fff3f8..18f1a3cea0 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -852,6 +852,7 @@ static void build_ignorelist(struct blame_scoreboard *sb,
 			oidset_clear(&sb->ignore_list);
 		else
 			oidset_parse_file_carefully(&sb->ignore_list, i->string,
+						    the_repository->hash_algo,
 						    peel_to_commit_oid, sb);
 	}
 	for_each_string_list_item(i, ignore_rev_list) {
diff --git a/fsck.c b/fsck.c
index 432996cbb6..304f4a17ec 100644
--- a/fsck.c
+++ b/fsck.c
@@ -205,7 +205,8 @@ void fsck_set_msg_types(struct fsck_options *options, const char *values)
 		if (!strcmp(buf, "skiplist")) {
 			if (equal == len)
 				die("skiplist requires a path");
-			oidset_parse_file(&options->skiplist, buf + equal + 1);
+			oidset_parse_file(&options->skiplist, buf + equal + 1,
+					  the_repository->hash_algo);
 			buf += len + 1;
 			continue;
 		}
diff --git a/oidset.c b/oidset.c
index 91d1385910..8d36aef8dc 100644
--- a/oidset.c
+++ b/oidset.c
@@ -48,12 +48,14 @@ void oidset_clear(struct oidset *set)
 	oidset_init(set, 0);
 }
 
-void oidset_parse_file(struct oidset *set, const char *path)
+void oidset_parse_file(struct oidset *set, const char *path,
+		       const struct git_hash_algo *algop)
 {
-	oidset_parse_file_carefully(set, path, NULL, NULL);
+	oidset_parse_file_carefully(set, path, algop, NULL, NULL);
 }
 
 void oidset_parse_file_carefully(struct oidset *set, const char *path,
+				 const struct git_hash_algo *algop,
 				 oidset_parse_tweak_fn fn, void *cbdata)
 {
 	FILE *fp;
@@ -79,7 +81,7 @@ void oidset_parse_file_carefully(struct oidset *set, const char *path,
 		if (!sb.len)
 			continue;
 
-		if (parse_oid_hex(sb.buf, &oid, &p) || *p != '\0')
+		if (parse_oid_hex_algop(sb.buf, &oid, &p, algop) || *p != '\0')
 			die("invalid object name: %s", sb.buf);
 		if (fn && fn(&oid, cbdata))
 			continue;
diff --git a/oidset.h b/oidset.h
index 262f4256d6..0106b6f278 100644
--- a/oidset.h
+++ b/oidset.h
@@ -80,7 +80,8 @@ void oidset_clear(struct oidset *set);
  * are allowed.  Leading whitespace and empty or white-space only lines are
  * ignored.
  */
-void oidset_parse_file(struct oidset *set, const char *path);
+void oidset_parse_file(struct oidset *set, const char *path,
+		       const struct git_hash_algo *algop);
 
 /*
  * Similar to the above, but with a callback which can (1) return non-zero to
@@ -89,6 +90,7 @@ void oidset_parse_file(struct oidset *set, const char *path);
  */
 typedef int (*oidset_parse_tweak_fn)(struct object_id *, void *);
 void oidset_parse_file_carefully(struct oidset *set, const char *path,
+				 const struct git_hash_algo *algop,
 				 oidset_parse_tweak_fn fn, void *cbdata);
 
 struct oidset_iter {