diff --git a/modules/ui/options.js b/modules/ui/options.js
index b7d7bcdf..5ae560e6 100644
--- a/modules/ui/options.js
+++ b/modules/ui/options.js
@@ -186,6 +186,7 @@ function changeMapSize() {
 
   const maxWidth = Math.max(+mapWidthInput.value, graphWidth);
   const maxHeight = Math.max(+mapHeightInput.value, graphHeight);
+
   zoom.translateExtent([
     [0, 0],
     [maxWidth, maxHeight]
@@ -196,6 +197,7 @@ function changeMapSize() {
   oceanLayers.select("rect").attr("x", 0).attr("y", 0).attr("width", maxWidth).attr("height", maxHeight);
   fogging.selectAll("rect").attr("x", 0).attr("y", 0).attr("width", maxWidth).attr("height", maxHeight);
   defs.select("mask#fog > rect").attr("width", maxWidth).attr("height", maxHeight);
+  defs.select("mask#water > rect").attr("width", maxWidth).attr("height", maxHeight);
 
   fitScaleBar();
   if (window.fitLegendBox) fitLegendBox();