Import UnknownFileError
diff --git a/Lib/distutils/bcppcompiler.py b/Lib/distutils/bcppcompiler.py
index 00ccec5..2742b5f 100644
--- a/Lib/distutils/bcppcompiler.py
+++ b/Lib/distutils/bcppcompiler.py
@@ -17,7 +17,7 @@
import sys, os
from distutils.errors import \
DistutilsExecError, DistutilsPlatformError, \
- CompileError, LibError, LinkError
+ CompileError, LibError, LinkError, UnknownFileError
from distutils.ccompiler import \
CCompiler, gen_preprocess_options, gen_lib_options
from distutils.file_util import write_file