diff --git a/codearchiver/storage.py b/codearchiver/storage.py
index b0439cb..30b5394 100644
--- a/codearchiver/storage.py
+++ b/codearchiver/storage.py
@@ -144,10 +144,11 @@ class DirectoryStorage(Storage):
 		self._newFiles.append(filename)
 		if not metadata:
 			return
-		metadataFilename = os.path.join(self._directory, f'{filename}_codearchiver_metadata.txt')
+		metadataFilename = f'{filename}_codearchiver_metadata.txt'
+		metadataPath = os.path.join(self._directory, metadataFilename)
 		# No need to check for existence here thanks to the 'x' mode
 		_logger.info(f'Writing metadata for {filename} to {metadataFilename}')
-		with open(metadataFilename, 'x') as fp:
+		with open(metadataPath, 'x') as fp:
 			fp.write(metadata.serialise())
 		self._newFiles.append(metadataFilename)