diff --git a/vendor/clouds3d.js b/vendor/clouds3d.js
index bede41d..d4f2de0 100644
--- a/vendor/clouds3d.js
+++ b/vendor/clouds3d.js
@@ -331,8 +331,8 @@ function rebuildGroundMosaic(centerTileX, centerTileY) {
     }
     return Promise.all(promises).then(function() {
         if (groundTexture && groundGl) {
-            groundGl.bindTexture(gl.TEXTURE_2D, groundTexture);
-            groundGl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, groundCanvas);
+            groundGl.bindTexture(groundGl.TEXTURE_2D, groundTexture);
+            groundGl.texImage2D(groundGl.TEXTURE_2D, 0, groundGl.RGBA, groundGl.RGBA, groundGl.UNSIGNED_BYTE, groundCanvas);
         }
     });
 }