diff --git a/src/docs/HISTORY.md b/src/docs/HISTORY.md
index 991146748..022fe29aa 100644
--- a/src/docs/HISTORY.md
+++ b/src/docs/HISTORY.md
@@ -27,6 +27,7 @@ v1.2.8
 - Fixed Save Resolution setting being set to Half Size when Save Annotations
   was on.
 - Made Status Bar error/warnings remain longer (8 seconds instead of 5).
+- Fixed a precision issue on Windows with arbitrary scalings like 115%.
 
 
 v1.2.7
diff --git a/src/lib/mrvGL/mrvTimelineViewport.cpp b/src/lib/mrvGL/mrvTimelineViewport.cpp
index fc6ca3bdf..368691214 100644
--- a/src/lib/mrvGL/mrvTimelineViewport.cpp
+++ b/src/lib/mrvGL/mrvTimelineViewport.cpp
@@ -2278,21 +2278,31 @@ namespace mrv
                 w->fullscreen();
                 view->take_focus();
 
+                int PW = pixel_w();
+                int PH = pixel_h();
+
                 if (!secondary)
                 {
-                    // Fullscreen does not update immediately, so we need
-                    // to force a resize.
+                    // Fullscreen does not update immediately on Linux, so we
+                    // need to force a resize.  On macOS, I am not sure, but
+                    // we'll also leave it.
+                    // On Windows, we should not call screen_xywh as it may
+                    // be wrong for scaling factors like 115%.
+#ifndef _WIN32
                     int X, Y, W, H;
                     int screen_num = w->screen_num();
                     Fl::screen_xywh(X, Y, W, H, screen_num);
                     w->resize(X, Y, W, H);
-
+#endif
+                    
                     // When fullscreen happens, the tool group bar also resizes
                     // on width, so we need to bring it back to its originazl
                     // size.
                     p.ui->uiRegion->layout();
+                    
                     p.ui->uiViewGroup->layout();
                     p.ui->uiViewGroup->redraw();
+                    
                 }
             }
         }