diff --git a/script/upload-windows-pdb.py b/script/upload-windows-pdb.py
index d7da8c13d049..c3e6863e50d2 100755
--- a/script/upload-windows-pdb.py
+++ b/script/upload-windows-pdb.py
@@ -24,6 +24,7 @@ def main():
 
   bucket, access_key, secret_key = s3_config()
   files = glob.glob(SYMBOLS_DIR + '/*.pdb/*/*.pdb')
+  files = [f.lower() for f in files]
   upload_symbols(bucket, access_key, secret_key, files)