diff --git a/internal/ceres/line_search.h b/internal/ceres/line_search.h
index 5f24e9f..57ef9e7 100644
--- a/internal/ceres/line_search.h
+++ b/internal/ceres/line_search.h
@@ -71,6 +71,7 @@
           max_num_iterations(20),
           sufficient_curvature_decrease(0.9),
           max_step_expansion(10.0),
+          is_silent(false),
           function(NULL) {}
 
     // Degree of the polynomial used to approximate the objective
@@ -144,6 +145,8 @@
     // By definition for expansion, max_step_expansion > 1.0.
     double max_step_expansion;
 
+    bool is_silent;
+
     // The one dimensional function that the line search algorithm
     // minimizes.
     Function* function;