diff --git a/src/utils_periodic/NEED b/src/utils_periodic/NEED
new file mode 100644
index 00000000..49c1d899
--- /dev/null
+++ b/src/utils_periodic/NEED
@@ -0,0 +1,4 @@
+ao_two_e_ints
+ao_one_e_ints
+mo_two_e_ints
+