diff --git a/clang/tools/scan-build-py/lib/libscanbuild/report.py b/clang/tools/scan-build-py/lib/libscanbuild/report.py
--- a/clang/tools/scan-build-py/lib/libscanbuild/report.py
+++ b/clang/tools/scan-build-py/lib/libscanbuild/report.py
@@ -417,7 +417,7 @@
         'bug_path_length': 1
     }
 
-    with open(filename) as handler:
+    with open(filename, encoding="utf-8") as handler:
         for line in handler.readlines():
             # do not read the file further
             if endsign.match(line):