diff --git a/booru_viewer/gui/grid.py b/booru_viewer/gui/grid.py
index 39764e3..5df8326 100644
--- a/booru_viewer/gui/grid.py
+++ b/booru_viewer/gui/grid.py
@@ -571,7 +571,8 @@ class ThumbnailGrid(QScrollArea):
             # Empty space: flow layout, viewport, or cell padding (missed pixmap)
             is_empty = child is self.widget() or child is self.viewport()
             if not is_empty and isinstance(child, ThumbnailWidget):
-                local = child.mapFromParent(self.widget().mapFromParent(event.position().toPoint()))
+                global_pos = self.mapToGlobal(event.position().toPoint())
+                local = child.mapFromGlobal(global_pos)
                 if not child._hit_pixmap(local):
                     is_empty = True
             if is_empty: