diff --git a/server/src/snapshot/patch_compute.rs b/server/src/snapshot/patch_compute.rs
index 6ef5d36a..ec60500c 100644
--- a/server/src/snapshot/patch_compute.rs
+++ b/server/src/snapshot/patch_compute.rs
@@ -173,7 +173,7 @@ fn compute_children_patches<'a>(
                         .expect("Instance did not exist in tree");
 
                     if snapshot_child.name == instance_child.name
-                        && instance_child.class_name == instance_child.class_name
+                        && snapshot_child.class_name == instance_child.class_name
                     {
                         paired_instances[*instance_index] = true;
                         return true;
@@ -327,4 +327,4 @@ mod test {
 
         assert_eq!(patch_set, expected_patch_set);
     }
-}
+}
\ No newline at end of file