diff --git a/src/tools/hcore_guess.irp.f b/src/tools/hcore_guess.irp.f
new file mode 100644
index 00000000..87d0cb7d
--- /dev/null
+++ b/src/tools/hcore_guess.irp.f
@@ -0,0 +1,3 @@
+program hcore_guess_prog
+ call hcore_guess
+end