diff --git a/moist_thermodynamics/__init__.py b/moist_thermodynamics/__init__.py
index 0ce844c8eac3ba95ec5269974213a8429759e50a..956a73e1c269b0a63a5ad9c9ea1f6d7b72c06d2d 100644
--- a/moist_thermodynamics/__init__.py
+++ b/moist_thermodynamics/__init__.py
@@ -1 +1,2 @@
-# content of __init__.py
+from .functions import *
+from . import constants