diff --git a/tools/linter_lib/custom_check.py b/tools/linter_lib/custom_check.py
index bdf2bbc124..07e1e3ac6f 100644
--- a/tools/linter_lib/custom_check.py
+++ b/tools/linter_lib/custom_check.py
@@ -499,11 +499,6 @@ def build_custom_checkers(by_lang):
          'bad_lines': ['return json_error(_variable)', 'return json_error(_(variable))']},
         {'pattern': r'''\Wjson_error\(['"].+[),]$''',
          'exclude': set(['zerver/tests']),
-         'exclude_line': set([
-             # We don't want this string tagged for translation.
-             ('zerver/views/compatibility.py', 'return json_error("Client is too old")  # take 0'),
-             ('zerver/views/compatibility.py', 'return json_error("Client is too old")'),
-         ]),
          'description': 'Argument to json_error should a literal string enclosed by _()'},
         # To avoid JsonableError(_variable) and JsonableError(_(variable))
         {'pattern': r'\WJsonableError\(_\(?\w.+\)',
diff --git a/zerver/views/compatibility.py b/zerver/views/compatibility.py
index ae64d74ebc..6b2e9f23e6 100644
--- a/zerver/views/compatibility.py
+++ b/zerver/views/compatibility.py
@@ -71,12 +71,15 @@ def find_mobile_os(user_agent: str) -> Optional[str]:
 android_min_app_version = '16.2.96'
 
 def check_global_compatibility(request: HttpRequest) -> HttpResponse:
+    # This string should not be tagged for translation, since old
+    # clients are checking for an extra string.
+    legacy_compatibility_error_message = "Client is too old"
     user_agent = parse_user_agent(request.META["HTTP_USER_AGENT"])
     if user_agent['name'] == "ZulipInvalid":
-        return json_error("Client is too old")  # take 0
+        return json_error(legacy_compatibility_error_message)
     if user_agent['name'] == "ZulipMobile":
         user_os = find_mobile_os(request.META["HTTP_USER_AGENT"])
         if (user_os == 'android'
                 and version_lt(user_agent['version'], android_min_app_version)):
-            return json_error("Client is too old")
+            return json_error(legacy_compatibility_error_message)
     return json_success()