diff --git a/include/eigenpy/quaternion.hpp b/include/eigenpy/quaternion.hpp
index 2e8de04ea03b96ef34a81cf0203d78482b54439b..1087180a8c7c1b8c4435f150de2702375d812b34 100644
--- a/include/eigenpy/quaternion.hpp
+++ b/include/eigenpy/quaternion.hpp
@@ -185,7 +185,7 @@ namespace eigenpy
            "Returns the quaternion describing the inverse rotation.")
       .def("setIdentity",&Quaternion::setIdentity,
            bp::arg("self"),
-           "Set *this to the idendity rotation.",
+           "Set *this to the identity rotation.",
            bp::return_self<>())
       .def("norm",&Quaternion::norm,
            bp::arg("self"),