diff --git a/src/impl/platforms/linux/internal_platform_utils.py b/src/impl/platforms/linux/internal_platform_utils.py
index 1afcc0fd..29dbb508 100644
--- a/src/impl/platforms/linux/internal_platform_utils.py
+++ b/src/impl/platforms/linux/internal_platform_utils.py
@@ -246,6 +246,7 @@ def _FindPostmaster(
             pid_to_ppid,
         )
 
+    # --------------------------------------------------------------------
     def ProcessIsZombi_soft_check(
         self,
         os_ops: OsOperations,
@@ -316,7 +317,7 @@ def _find_postmaster__throw_error__bad_line_format(
     ) -> typing.NoReturn:
         assert type(lines) is list
         assert type(i_line) is int
-        assert type(hint) is int
+        assert type(hint) is str
 
         error_lines: typing.List[str] = []
         error_lines.append(