diff --git a/modules/canvaskit/externs.js b/modules/canvaskit/externs.js
index c32d318..da7d808 100644
--- a/modules/canvaskit/externs.js
+++ b/modules/canvaskit/externs.js
@@ -207,7 +207,6 @@
     drawLine: function() {},
     drawPaint: function() {},
     drawParagraph: function() {},
-    drawPatch: function() {},
     drawPath: function() {},
     drawPicture: function() {},
     drawRect4f: function() {},
@@ -244,6 +243,7 @@
       drawImageRectCubic: function() {},
       drawImageRectOptions: function() {},
       drawOval: function() {},
+      drawPatch: function() {},
       drawPoints: function() {},
       drawRect: function() {},
       drawRRect:  function() {},
diff --git a/modules/canvaskit/interface.js b/modules/canvaskit/interface.js
index f72f544..6326b2f 100644
--- a/modules/canvaskit/interface.js
+++ b/modules/canvaskit/interface.js
@@ -629,13 +629,13 @@
 
   CanvasKit.Canvas.prototype.drawPatch = function(cubics, colors, texs, mode, paint) {
     if (cubics.length < 24) {
-        throw "Need 12 cubic points";
+        throw 'Need 12 cubic points';
     }
     if (colors && colors.length < 4) {
-        throw "Need 4 colors";
+        throw 'Need 4 colors';
     }
     if (texs && texs.length < 8) {
-        throw "Need 4 shader coordinates";
+        throw 'Need 4 shader coordinates';
     }
 
     const cubics_ptr =          copy1dArray(cubics, 'HEAPF32');