diff --git a/tools/python/src/svm_c_trainer.cpp b/tools/python/src/svm_c_trainer.cpp
index 19348a4e8..6d9d4ef04 100644
--- a/tools/python/src/svm_c_trainer.cpp
+++ b/tools/python/src/svm_c_trainer.cpp
@@ -212,6 +212,8 @@ void bind_svm_c_trainer()
             .add_property("max_iterations", &T::get_max_iterations, &T::set_max_iterations)
             .add_property("force_last_weight_to_1", &T::forces_last_weight_to_1, &T::force_last_weight_to_1)
             .add_property("learns_nonnegative_weights", &T::learns_nonnegative_weights, &T::set_learns_nonnegative_weights)
+            .add_property("has_prior", &T::has_prior)
+            .def("set_prior", &T::set_prior)
             .def("be_verbose", &T::be_verbose)
             .def("be_quiet", &T::be_quiet);
 
@@ -227,6 +229,8 @@ void bind_svm_c_trainer()
             .add_property("max_iterations", &T::get_max_iterations, &T::set_max_iterations)
             .add_property("force_last_weight_to_1", &T::forces_last_weight_to_1, &T::force_last_weight_to_1)
             .add_property("learns_nonnegative_weights", &T::learns_nonnegative_weights, &T::set_learns_nonnegative_weights)
+            .add_property("has_prior", &T::has_prior)
+            .def("set_prior", &T::set_prior)
             .def("be_verbose", &T::be_verbose)
             .def("be_quiet", &T::be_quiet);
 
diff --git a/tools/python/src/svm_rank_trainer.cpp b/tools/python/src/svm_rank_trainer.cpp
index 936dd7b10..bd355012b 100644
--- a/tools/python/src/svm_rank_trainer.cpp
+++ b/tools/python/src/svm_rank_trainer.cpp
@@ -93,8 +93,10 @@ void add_ranker (
         .add_property("max_iterations", &trainer::get_max_iterations, &trainer::set_max_iterations)
         .add_property("force_last_weight_to_1", &trainer::forces_last_weight_to_1, &trainer::force_last_weight_to_1)
         .add_property("learns_nonnegative_weights", &trainer::learns_nonnegative_weights, &trainer::set_learns_nonnegative_weights)
+        .add_property("has_prior", &trainer::has_prior)
         .def("train", train1<trainer>)
         .def("train", train2<trainer>)
+        .def("set_prior", &trainer::set_prior)
         .def("be_verbose", &trainer::be_verbose)
         .def("be_quiet", &trainer::be_quiet);
 }