diff --git a/Lib/distutils/ccompiler.py b/Lib/distutils/ccompiler.py
index bfcf127..46fb743 100644
--- a/Lib/distutils/ccompiler.py
+++ b/Lib/distutils/ccompiler.py
@@ -932,6 +932,8 @@
         obj_names = []
         for src_name in source_filenames:
             base, ext = os.path.splitext(src_name)
+            base = os.path.splitdrive(base)[1] # Chop off the drive
+            base = base[os.path.isabs(base):]  # If abs, chop off leading /
             if ext not in self.src_extensions:
                 raise UnknownFileError, \
                       "unknown file type '%s' (from '%s')" % (ext, src_name)