1 files changed, 1 insertions, 1 deletions
diff --git a/fluid/widgets/Text_Viewer.h b/fluid/widgets/Text_Viewer.h
index 98fa9200f..ced32cd39 100644
--- a/fluid/widgets/Text_Viewer.h
+++ b/fluid/widgets/Text_Viewer.h
@@ -31,7 +31,7 @@ namespace widget {
  */
 class Text_Viewer : public Fl_Text_Display {
 public:
-  Text_Viewer(int X, int Y, int W, int H, const char *L = nullptr);
+  Text_Viewer(int X, int Y, int W, int H, const char *L = 0);
   ~Text_Viewer();
   void draw() override;