diff --git a/modules/kinematics/include/RRT.h b/modules/kinematics/include/RRT.h
index 8dec5d14db..2608189510 100644
--- a/modules/kinematics/include/RRT.h
+++ b/modules/kinematics/include/RRT.h
@@ -107,7 +107,9 @@ class IMPKINEMATICSEXPORT RRT : public IMP::Sampler {
     unsigned int number_of_collisions_;
   };
 
+#ifndef SWIG
   friend std::ostream& operator<<(std::ostream& s, const Parameters& p);
+#endif
 
  public:
   //! Constructor
diff --git a/modules/saxs/include/FormFactorTable.h b/modules/saxs/include/FormFactorTable.h
index 76bf6e6662..abbcd9b9bf 100644
--- a/modules/saxs/include/FormFactorTable.h
+++ b/modules/saxs/include/FormFactorTable.h
@@ -212,6 +212,7 @@ class IMPSAXSEXPORT FormFactorTable {
     double excl_vol_;
   };
 
+#ifndef SWIG
   // read entry
   friend std::istream& operator>>(
       std::istream& s, AtomFactorCoefficients& atom_factor_coefficients);
@@ -219,6 +220,7 @@ class IMPSAXSEXPORT FormFactorTable {
   // write entry
   friend std::ostream& operator<<(
       std::ostream& s, const AtomFactorCoefficients& atom_factor_coefficients);
+#endif
 
  private:
   int read_form_factor_table(const std::string& table_name);