diff --git a/src/dynamic_graph/sot/dyninv/meta_tasks_dyn.py b/src/dynamic_graph/sot/dyninv/meta_tasks_dyn.py
index 111d8e420b2e114df6b069b86db36e676a7f379e..f7583118169230181ac717956b35320ad02723b7 100644
--- a/src/dynamic_graph/sot/dyninv/meta_tasks_dyn.py
+++ b/src/dynamic_graph/sot/dyninv/meta_tasks_dyn.py
@@ -2,7 +2,7 @@ from dynamic_graph.sot.core.meta_task_6d import toFlags
 from dynamic_graph import plug
 from dynamic_graph.sot.core import *
 from dynamic_graph.sot.dyninv import *
-from matrix_util import matrixToTuple, vectorToTuple,rotate
+from dynamic_graph.sot.core.matrix_util import matrixToTuple, vectorToTuple,rotate, matrixToRPY
 from numpy import matrix, identity, zeros, eye