diff --git a/CHANGES.md b/CHANGES.md
index 316cf359b41b..93f7114c8507 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,6 +8,7 @@ Change Log
 
 ##### Fixes :wrench:
 Disabled HDR by default to improve visual quality in most standard use cases. Set `viewer.scene.highDynamicRange = true` to re-enable it. [#7966](https://github.com/AnalyticalGraphicsInc/cesium/issues/7966)
+* Fixed glTF models with missing sampler to load with default properties. [#7916](https://github.com/AnalyticalGraphicsInc/cesium/issues/7916)
 
 ### 1.60 - 2019-08-01
 
diff --git a/Source/Scene/processPbrMaterials.js b/Source/Scene/processPbrMaterials.js
index 9dd5ec113dc0..9e1796dff15b 100644
--- a/Source/Scene/processPbrMaterials.js
+++ b/Source/Scene/processPbrMaterials.js
@@ -90,11 +90,17 @@ define([
     function addTextureCoordinates(gltf, textureName, generatedMaterialValues, defaultTexCoord, result) {
         var texCoord;
         if (defined(generatedMaterialValues[textureName + 'Offset'])) {
+            var repeatS = 'true';
+            var repeatT = 'true';
+
             var textureIndex = generatedMaterialValues[textureName].index;
-            var sampler = gltf.samplers[gltf.textures[textureIndex].sampler];
+            var samplerName = gltf.textures[textureIndex].sampler;
 
-            var repeatS = sampler.wrapS === WebGLConstants.REPEAT ? 'true' : 'false';
-            var repeatT = sampler.wrapT === WebGLConstants.REPEAT ? 'true' : 'false';
+            if (defined(samplerName) && defined(gltf.samplers)) {
+                var sampler = gltf.samplers[samplerName];
+                repeatS = sampler.wrapS === WebGLConstants.REPEAT ? 'true' : 'false';
+                repeatT = sampler.wrapT === WebGLConstants.REPEAT ? 'true' : 'false';
+            }
 
             texCoord = textureName + 'Coord';
             result.fragmentShaderMain += '    vec2 ' + texCoord + ' = computeTexCoord(' + defaultTexCoord + ', ' + textureName + 'Offset, ' + textureName + 'Rotation, ' + textureName + 'Scale, ' + repeatS + ', ' + repeatT + ');\n';