diff --git a/src/h5core/h5_hdf5.c b/src/h5core/h5_hdf5.c
index 3c12c44..cfac2e6 100644
--- a/src/h5core/h5_hdf5.c
+++ b/src/h5core/h5_hdf5.c
@@ -359,6 +359,8 @@ hdf5_get_name_of_dataset_by_idx (
 		                (long unsigned int)idx,
 		                hdf5_get_objname (loc_id)));
 	}
+	if (op_data.cnt < 0)
+		HDF5_WRAPPER_LEAVE (H5_NOK);
 	HDF5_WRAPPER_RETURN (H5_SUCCESS);
 }