1 files changed, 1 insertions, 0 deletions
diff --git a/src/win.h b/src/win.h
index 5c70e1e..f71dcf8 100644
--- a/src/win.h
+++ b/src/win.h
@@ -25,6 +25,7 @@ struct PuglInternalsImpl {
   HCURSOR      cursor;
   HDC          hdc;
   PuglSurface* surface;
+  double       scaleFactor;
   bool         flashing;
   bool         mouseTracked;
 };