diff --git a/src/dynamic_graph/sot/dynamics/__init__.py b/src/dynamic_graph/sot/dynamics/__init__.py
index cd227368ef52dcf97ae04a6a76556a9c936d9557..650d3f26f20dd737c78cc7922fa452a2e7010010 100644
--- a/src/dynamic_graph/sot/dynamics/__init__.py
+++ b/src/dynamic_graph/sot/dynamics/__init__.py
@@ -1,2 +1,4 @@
-import dynamic
-dynamic.Dynamic('')
+from dynamic import Dynamic
+from angle_estimator import AngleEstimator
+Dynamic('')
+AngleEstimator('')