diff --git a/CHANGES.md b/CHANGES.md
index ebca07449f14..ccea7a4fa878 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,6 +9,7 @@ Change Log
     * 
 * Fixed a crash that would occur when using dynamic `distanceDisplayCondition` properties. [#4403](https://github.com/AnalyticalGraphicsInc/cesium/pull/4403)
 * Fixed a bug affected models with multiple meshes without indices. [#4237](https://github.com/AnalyticalGraphicsInc/cesium/issues/4237)
+* Fixed a glTF transparency bug where `blendFuncSeparate` parameters were loaded in the wrong order. [#4435](https://github.com/AnalyticalGraphicsInc/cesium/pull/4435)
 
 ### 1.26 - 2016-10-03
 
diff --git a/Source/Scene/Model.js b/Source/Scene/Model.js
index a47091a90048..845812c6638f 100644
--- a/Source/Scene/Model.js
+++ b/Source/Scene/Model.js
@@ -2273,9 +2273,9 @@ define([
             WebGLConstants.FUNC_ADD,
             WebGLConstants.FUNC_ADD]);
         var blendFuncSeparate = defaultValue(statesFunctions.blendFuncSeparate, [
-            WebGLConstants.ONE,
             WebGLConstants.ONE,
             WebGLConstants.ZERO,
+            WebGLConstants.ONE,
             WebGLConstants.ZERO]);
         var colorMask = defaultValue(statesFunctions.colorMask, [true, true, true, true]);
         var depthRange = defaultValue(statesFunctions.depthRange, [0.0, 1.0]);
@@ -2329,8 +2329,8 @@ define([
                 equationRgb : blendEquationSeparate[0],
                 equationAlpha : blendEquationSeparate[1],
                 functionSourceRgb : blendFuncSeparate[0],
-                functionSourceAlpha : blendFuncSeparate[1],
-                functionDestinationRgb : blendFuncSeparate[2],
+                functionDestinationRgb : blendFuncSeparate[1],
+                functionSourceAlpha : blendFuncSeparate[2],
                 functionDestinationAlpha : blendFuncSeparate[3]
             }
         });