diff --git a/lib/FitInterface.cpp b/lib/FitInterface.cpp
index 895e55c..206c195 100644
--- a/lib/FitInterface.cpp
+++ b/lib/FitInterface.cpp
@@ -191,6 +191,16 @@ const set<Index> & FitInterface::getDataIndexSet(void) const
     return dataIndexSet_;
 }
 
+double FitInterface::getSvdTolerance(void) const
+{
+    return svdTol_;
+}
+
+void FitInterface::setSvdTolerance(const double &tol)
+{
+    svdTol_ = tol;
+}
+
 VarName & FitInterface::xName(void)
 {
     return xName_;
diff --git a/lib/FitInterface.hpp b/lib/FitInterface.hpp
index 102ab6f..b23924a 100644
--- a/lib/FitInterface.hpp
+++ b/lib/FitInterface.hpp
@@ -77,6 +77,8 @@ public:
           Index             getYFitSize(const Index j) const;
           Index             getMaxDataIndex(void) const;
     const std::set<Index> & getDataIndexSet(void) const;
+          double            getSvdTolerance(void) const;
+          void              setSvdTolerance(const double &tol);
           VarName &         xName(void);
     const VarName &         xName(void) const;
           VarName &         yName(void);
@@ -147,6 +149,7 @@ private:
     bool                                initLayout_{true};
     bool                                initVarMat_{true};
     bool                                initDataCoord_{true};
+    double                              svdTol_{1.e-10};
 };
 
 std::ostream & operator<<(std::ostream &out, FitInterface &f);