diff --git a/common/protob/pb2py b/common/protob/pb2py
index 336f2da067..8bb67978e1 100755
--- a/common/protob/pb2py
+++ b/common/protob/pb2py
@@ -558,6 +558,10 @@ class RustBlobRenderer:
         enums = []
         cursor = 0
         for enum in sorted(self.descriptor.enums, key=lambda e: e.name):
+            # MessageType enum has more than 255 elements yet is never used
+            # for testing membership or iteration.
+            if enum.name == MESSAGE_TYPE_ENUM:
+                continue
             self.enum_map[enum.name] = cursor
             enum_blob = ENUM_ENTRY.build(sorted(v.number for v in enum.value))
             enums.append(enum_blob)