diff --git a/Fltk/graphicWindow.cpp b/Fltk/graphicWindow.cpp
index 30a34d990ad64c7ff7029a2518c814f20f423d48..01a05c47336beb2154bf285f3685eddce6a07e62 100644
--- a/Fltk/graphicWindow.cpp
+++ b/Fltk/graphicWindow.cpp
@@ -2277,7 +2277,7 @@ void quick_access_cb(Fl_Widget *w, void *data)
       if(opt_view_visible(i, GMSH_GET, 0))
         opt_view_intervals_type(i, GMSH_SET|GMSH_GUI, 1);
     drawContext::global()->draw();
-    double val;
+    double val = 0.;
     for(unsigned int i = 0; i < PView::list.size(); i++){
       if(opt_view_visible(i, GMSH_GET, 0)){
         val = numberOrStringOptionChooser("View", i, "NbIso",
@@ -2299,7 +2299,7 @@ void quick_access_cb(Fl_Widget *w, void *data)
       if(opt_view_visible(i, GMSH_GET, 0))
         opt_view_intervals_type(i, GMSH_SET|GMSH_GUI, 3);
     drawContext::global()->draw();
-    double val;
+    double val = 0.;
     for(unsigned int i = 0; i < PView::list.size(); i++){
       if(opt_view_visible(i, GMSH_GET, 0)){
         val = numberOrStringOptionChooser("View", i, "NbIso",
@@ -2331,7 +2331,7 @@ void quick_access_cb(Fl_Widget *w, void *data)
       if(opt_view_visible(i, GMSH_GET, 0))
         opt_view_vector_type(i, GMSH_SET|GMSH_GUI, 5);
     drawContext::global()->draw();
-    double val;
+    double val = 0.;
     for(unsigned int i = 0; i < PView::list.size(); i++){
       if(opt_view_visible(i, GMSH_GET, 0)){
         double maxval = std::max(fabs(opt_view_min(i, GMSH_GET, 0)),
diff --git a/Fltk/optionWindow.cpp b/Fltk/optionWindow.cpp
index 74c2a773fe50117e80f6f6bec5a08d96299307d9..2a5f130feb652c2f75fc8e6fee52421d16f1dd43 100644
--- a/Fltk/optionWindow.cpp
+++ b/Fltk/optionWindow.cpp
@@ -3563,7 +3563,7 @@ void optionWindow::resetExternalViewList()
     view.choice[10]->add(str, 0, NULL);
     view.choice[11]->add(str, 0, NULL);
   }
-  if(view.index >= 0 && view.index < PView::list.size()){
+  if(view.index >= 0 && view.index < (int)PView::list.size()){
     opt_view_external_view(view.index, GMSH_GUI, 0);
     opt_view_gen_raise_view(view.index, GMSH_GUI, 0);
   }