diff --git a/Fltk/solverButton.h b/Fltk/solverButton.h
index 292e82eb772c3c49634789de24521553965860a5..c2faaab5610c9516d93d2e4a60c3f3a8ea7b76fc 100644
--- a/Fltk/solverButton.h
+++ b/Fltk/solverButton.h
@@ -16,7 +16,7 @@ class solverButton : public Fl_Group {
  private:
   Fl_Button *_butt[2];
   Fl_Menu_Button *_popup;
-  char _tooltip[256], _arrow[32];
+  char _tooltip[256];
  public:
   solverButton(int x, int y, int w, int h, int num, Fl_Color col);
   void copy_label(const std::string &label){ _butt[0]->copy_label(label.c_str()); }
diff --git a/Fltk/viewButton.h b/Fltk/viewButton.h
index d47443c60b31bcca096e3d1abd5602e0d22781ec..5700c21d08a498517a2f58539ca260f7ad477a31 100644
--- a/Fltk/viewButton.h
+++ b/Fltk/viewButton.h
@@ -17,7 +17,7 @@ class viewButton : public Fl_Group {
   Fl_Check_Button *_toggle;
   Fl_Button *_butt;
   Fl_Menu_Button *_popup;
-  char _tooltip[256], _arrow[32];
+  char _tooltip[256];
  public:
   viewButton(int x, int y, int w, int h, int num, Fl_Color col);
   double value() { return _toggle->value(); }