1 files changed, 4 insertions, 4 deletions
diff --git a/FL/Fl_Widget_Tracker.H b/FL/Fl_Widget_Tracker.H
index fb2182e5f..0a2a5b6da 100644
--- a/FL/Fl_Widget_Tracker.H
+++ b/FL/Fl_Widget_Tracker.H
@@ -87,11 +87,11 @@ public:
   /**
    Clear the widget pointer.
    */
-  void clear() { wp_ = nullptr; }
+  void clear() { wp_ = 0; }
 
   /**
     Returns a pointer to the watched widget.
-    \return nullptr if the widget was deleted.
+    \return 0 if the widget was deleted.
   */
   Fl_Widget *widget() { return wp_; }
 
@@ -99,13 +99,13 @@ public:
     Check if the widget was deleted since the tracker was created.
     \return 1 if the watched widget has been deleted, otherwise 0
   */
-  int deleted() {return wp_ == nullptr;}
+  int deleted() {return wp_ == 0;}
 
   /**
     Check if the widget exists and was not deleted since the tracker was created.
     \return 1 if the watched widget exists, otherwise 0
   */
-  int exists() { return wp_ != nullptr; }
+  int exists() { return wp_ != 0; }
 
 };