diff --git a/automotive/vehicle/tools/generate_annotation_enums.py b/automotive/vehicle/tools/generate_annotation_enums.py
index 154fe65..fc6f157 100644
--- a/automotive/vehicle/tools/generate_annotation_enums.py
+++ b/automotive/vehicle/tools/generate_annotation_enums.py
@@ -41,7 +41,7 @@
 TAB = "    "
 RE_ENUM_START = re.compile("\s*enum VehicleProperty \{")
 RE_ENUM_END = re.compile("\s*\}\;")
-RE_COMMENT_BEGIN = re.compile("\s*\/\*\*")
+RE_COMMENT_BEGIN = re.compile("\s*\/\*\*?")
 RE_COMMENT_END = re.compile("\s*\*\/")
 RE_CHANGE_MODE = re.compile("\s*\* @change_mode (\S+)\s*")
 RE_ACCESS = re.compile("\s*\* @access (\S+)\s*")