diff --git a/src/H5BlockTypes.h b/src/H5BlockTypes.h
index 47cb663..e12742d 100644
--- a/src/H5BlockTypes.h
+++ b/src/H5BlockTypes.h
@@ -17,6 +17,7 @@ struct H5BlockStruct {
 	h5part_int64_t k_max;
 	struct H5BlockPartition *user_layout;
 	struct H5BlockPartition *write_layout;
+	int have_layout;
 
 	hid_t shape;
 	hid_t memshape;