diff --git a/firecrest/path.py b/firecrest/path.py
index 3535929..0b80379 100644
--- a/firecrest/path.py
+++ b/firecrest/path.py
@@ -516,7 +516,7 @@ def mkdir(
         try:
             with self.convert_header_exceptions(
                 {
-                    "X-A-Directory": FileExistsError  # Note see: https://github.com/eth-cscs/firecrest/issues/172
+                    "X-Invalid-Path": FileExistsError  # Note see: https://github.com/eth-cscs/firecrest/issues/172
                 }
             ):
                 self._client.mkdir(self._machine, self.path, p=parents)