diff --git a/res/app/components/stf/screen/fast-image-render/webgl-render.js b/res/app/components/stf/screen/fast-image-render/webgl-render.js
index edc5e521..0aceb790 100644
--- a/res/app/components/stf/screen/fast-image-render/webgl-render.js
+++ b/res/app/components/stf/screen/fast-image-render/webgl-render.js
@@ -2,6 +2,8 @@
  Based on http://www-cs-students.stanford.edu/~eparker/files/crunch/renderer.js
  */
 
+/*global Float32Array */
+
 /**
  * Constructs a renderer object.
  * @param {WebGLRenderingContext} gl The GL context.