diff --git a/src/gui/views/gcal-month-view.c b/src/gui/views/gcal-month-view.c
index cc912071..70ab5deb 100644
--- a/src/gui/views/gcal-month-view.c
+++ b/src/gui/views/gcal-month-view.c
@@ -1657,7 +1657,7 @@ gcal_month_view_size_allocate (GtkWidget *widget,
   gtk_widget_measure (self->header, GTK_ORIENTATION_VERTICAL, width, &header_height, NULL, NULL, NULL);
   gtk_widget_allocate (self->header, width, header_height, baseline, NULL);
 
-  grid_height = height - header_height;
+  grid_height = height - header_height + 1;
   row_height = grid_height / (gdouble) N_ROWS_PER_PAGE;
   row_scroll_offset = self->row_offset * row_height;
   y_offset = header_height - row_scroll_offset - (grid_height * ((N_PAGES - 1) / 2.0));