1 files changed, 1 insertions, 1 deletions
diff --git a/FL/Fl_Copy_Surface.H b/FL/Fl_Copy_Surface.H
index fc116f3b5..29da059b9 100644
--- a/FL/Fl_Copy_Surface.H
+++ b/FL/Fl_Copy_Surface.H
@@ -102,7 +102,7 @@ public:
 class Fl_GDI_Surface_ : public Fl_Paged_Device {
   int width;
   int height;
-  int depth;
+  unsigned depth;
   POINT origins[10];
 public:
   static const char *class_id;