1 files changed, 1 insertions, 1 deletions
diff --git a/src/remake/snapshot.rs b/src/remake/snapshot.rs
index ee0a2cd..dc61810 100644
--- a/src/remake/snapshot.rs
+++ b/src/remake/snapshot.rs
@@ -274,7 +274,7 @@ pub(crate) fn build(
 ) -> Result<Snapshot, SnapshotError> {
     // fork_at with unknown heads would quietly build something else.
     for head in params.base_heads {
-        if source.get_change_by_hash(head).is_none() {
+        if !crate::document::changes::holds(source, head) {
             return Err(SnapshotError::MissingBase(*head));
         }
     }