diff --git a/tools/unity-avatar-exporter/Assets/Editor/AvatarExporter.cs b/tools/unity-avatar-exporter/Assets/Editor/AvatarExporter.cs
index 895550fb0a..0483e191ff 100644
--- a/tools/unity-avatar-exporter/Assets/Editor/AvatarExporter.cs
+++ b/tools/unity-avatar-exporter/Assets/Editor/AvatarExporter.cs
@@ -158,7 +158,7 @@ class AvatarExporter : MonoBehaviour {
         assetPath = AssetDatabase.GUIDToAssetPath(Selection.assetGUIDs[0]);
         assetName = Path.GetFileNameWithoutExtension(assetPath);
         ModelImporter modelImporter = ModelImporter.GetAtPath(assetPath) as ModelImporter;
-        if (assetPath.LastIndexOf(".fbx") == -1 || modelImporter == null) {
+        if (assetPath.ToLower().LastIndexOf(".fbx") == -1 || modelImporter == null) {
             EditorUtility.DisplayDialog("Error", "Please select an .fbx model asset to export.", "Ok");
             return;
         }
diff --git a/tools/unity-avatar-exporter/avatarExporter.unitypackage b/tools/unity-avatar-exporter/avatarExporter.unitypackage
index 5be646c7f2..9562dca380 100644
Binary files a/tools/unity-avatar-exporter/avatarExporter.unitypackage and b/tools/unity-avatar-exporter/avatarExporter.unitypackage differ