diff --git a/lib/optimization/loss_func.cpp b/lib/optimization/loss_func.cpp
index c110f8b..4d075bb 100644
--- a/lib/optimization/loss_func.cpp
+++ b/lib/optimization/loss_func.cpp
@@ -30,14 +30,14 @@
 gctl::loss_func::loss_func()
 {
     init_ = false;
-    eps_ = 1e-8;
+    eps_ = 1e-16;
     tnum_ = 0;
     ntype_ = L2;
 }
 
 gctl::loss_func::loss_func(const array<double> &tar, norm_type_e n_type, double p, double eps)
 {
-    init(tar, n_type);
+    init(tar, n_type, p, eps);
 }
 
 gctl::loss_func::~loss_func(){}