diff --git a/training/stringrenderer.cpp b/training/stringrenderer.cpp
index a891db19c..35aca8bae 100644
--- a/training/stringrenderer.cpp
+++ b/training/stringrenderer.cpp
@@ -101,6 +101,7 @@ StringRenderer::StringRenderer(const string& font_desc, int page_width,
       page_height_(page_height),
       h_margin_(50),
       v_margin_(50),
+      pen_color_{0.0, 0.0, 0.0},
       char_spacing_(0),
       leading_(0),
       vertical_text_(false),
@@ -120,15 +121,12 @@ StringRenderer::StringRenderer(const string& font_desc, int page_width,
       start_box_(0),
       page_(0),
       box_padding_(0),
+      page_boxes_(nullptr),
       total_chars_(0),
       font_index_(0),
       last_offset_(0) {
-  pen_color_[0] = 0.0;
-  pen_color_[1] = 0.0;
-  pen_color_[2] = 0.0;
   set_font(font_desc);
   set_resolution(kDefaultOutputResolution);
-  page_boxes_ = nullptr;
 }
 
 bool StringRenderer::set_font(const string& desc) {
diff --git a/training/stringrenderer.h b/training/stringrenderer.h
index 3fb3504ef..e1144d4ee 100644
--- a/training/stringrenderer.h
+++ b/training/stringrenderer.h
@@ -179,7 +179,7 @@ class StringRenderer {
   // Page properties
   int page_width_, page_height_, h_margin_, v_margin_;
   // Text rendering properties
-  int pen_color_[3];
+  double pen_color_[3];
   double char_spacing_;
   int leading_, resolution_;
   bool vertical_text_;