diff --git a/modules/io/src/gltf/glb-builder.js b/modules/io/src/gltf/glb-builder.js
index 3dc11378f..cb57ddfa2 100644
--- a/modules/io/src/gltf/glb-builder.js
+++ b/modules/io/src/gltf/glb-builder.js
@@ -12,9 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 /* eslint-disable camelcase, max-statements */
-import {padTo4Bytes, copyToArray} from '@loaders.gl/loader-utils';
+import {copyToArray} from '@loaders.gl/loader-utils';
 import {isImage} from '@loaders.gl/images';
 import {getAccessorTypeFromSize, getComponentTypeFromArray} from './gltf-utils/gltf-utils';
+import {padTo4Bytes} from './memory-copy-utils';
 import encodeGLBSync from './encode-glb';
 import {packBinaryJson} from '../writers/xviz-pack-binary';
 
diff --git a/modules/io/src/gltf/gltf-parser.js b/modules/io/src/gltf/gltf-parser.js
index d3f5943a3..fdda17b43 100644
--- a/modules/io/src/gltf/gltf-parser.js
+++ b/modules/io/src/gltf/gltf-parser.js
@@ -105,6 +105,8 @@ export class GLTFParser {
   getApplicationData(key) {
     if (this.json) {
       return this.json[key];
+    } else if (this.glbParser) {
+      return this.glbParser.getApplicationData(key);
     }
 
     return null;
diff --git a/modules/io/src/gltf/parse-glb.js b/modules/io/src/gltf/parse-glb.js
index 351f5d454..e4ecfab72 100644
--- a/modules/io/src/gltf/parse-glb.js
+++ b/modules/io/src/gltf/parse-glb.js
@@ -14,7 +14,8 @@
 /* global TextDecoder */
 /* eslint-disable camelcase, max-statements */
 import '../common/text-encoding';
-import {padTo4Bytes, assert} from '@loaders.gl/loader-utils';
+import {assert} from '@loaders.gl/loader-utils';
+import {padTo4Bytes} from './memory-copy-utils';
 
 const MAGIC_glTF = 0x676c5446; // glTF in Big-Endian ASCII