diff --git a/Assets/UniGLTF/Runtime/Extensions/StringExtensions.cs b/Assets/UniGLTF/Runtime/Extensions/StringExtensions.cs
index 27501679c..f06bba77b 100644
--- a/Assets/UniGLTF/Runtime/Extensions/StringExtensions.cs
+++ b/Assets/UniGLTF/Runtime/Extensions/StringExtensions.cs
@@ -74,6 +74,9 @@ namespace UniGLTF
             if (path.StartsWith('.'))
                 path = '+' + path;
 
+            if (path == "")
+                path = "(empty)";
+
             return path;
         }
 
diff --git a/Assets/VRM10/Runtime/StringExtensions.cs b/Assets/VRM10/Runtime/StringExtensions.cs
index f5fd9f8bd..bf790040d 100644
--- a/Assets/VRM10/Runtime/StringExtensions.cs
+++ b/Assets/VRM10/Runtime/StringExtensions.cs
@@ -69,6 +69,8 @@ namespace UniVRM10
             }
             if (path.StartsWith('.'))
                 path = '+' + path;
+            if (path == "")
+                path = "(empty)";
             return path;
         }
     }