diff --git a/include/eigenpy/details.hpp b/include/eigenpy/details.hpp
index 2e0c25400b118d980bd23e3e6fe6bae89a7b4d27..c7923ca5603b743d81c54b04cd5ccecc92f06494 100644
--- a/include/eigenpy/details.hpp
+++ b/include/eigenpy/details.hpp
@@ -68,6 +68,7 @@ void enableEigenPySpecific() {
   EigenToPyConverter<MatType>::registration();
 #if EIGEN_VERSION_AT_LEAST(3, 2, 0)
   EigenToPyConverter<Eigen::Ref<MatType> >::registration();
+  EigenToPyConverter<const Eigen::Ref<const MatType> >::registration();
 #endif
 
   // from-python