diff --git a/rbd/group_snap.go b/rbd/group_snap.go
index a9994b9d9..ce21499a1 100644
--- a/rbd/group_snap.go
+++ b/rbd/group_snap.go
@@ -217,7 +217,7 @@ func GroupSnapRollbackWithProgress(
 		data:     data,
 	}
 	cbIndex := groupSnapRollbackCallbacks.Add(ctx)
-	defer diffIterateCallbacks.Remove(cbIndex)
+	defer groupSnapRollbackCallbacks.Remove(cbIndex)
 
 	ret := C.wrap_rbd_group_snap_rollback_with_progress(
 		cephIoctx(ioctx),
diff --git a/rbd/sparsify.go b/rbd/sparsify.go
index 7435a1571..13a9dd948 100644
--- a/rbd/sparsify.go
+++ b/rbd/sparsify.go
@@ -72,7 +72,7 @@ func (image *Image) SparsifyWithProgress(
 		data:     data,
 	}
 	cbIndex := sparsifyCallbacks.Add(ctx)
-	defer diffIterateCallbacks.Remove(cbIndex)
+	defer sparsifyCallbacks.Remove(cbIndex)
 
 	ret := C.wrap_rbd_sparsify_with_progress(image.image, C.size_t(sparseSize), C.uintptr_t(cbIndex))