diff --git a/tools/write_version_header.py b/tools/write_version_header.py
index 0325f6f..dd02a69 100755
--- a/tools/write_version_header.py
+++ b/tools/write_version_header.py
@@ -123,7 +123,7 @@
     guard = '%s_' % args.cpp_out.upper()
     guard = re.sub(r'[^\w]', '_', guard)
     lines = []
-    lines.append('// Generated by %s' % __file__)
+    lines.append('// Generated by %s' % os.path.basename(__file__))
     lines.append('')
     lines.append('#ifndef %s' % guard)
     lines.append('#define %s' % guard)