diff --git a/doc/changelog.txt b/doc/changelog.txt
index 5e0d8d54..d4e9dfca 100644
--- a/doc/changelog.txt
+++ b/doc/changelog.txt
@@ -6,6 +6,8 @@ Fixes:
 - logging: Enforce encoding error policy when writing to stdout.
 - checking: Prevent error message from Geoip by using the correct
   API function when no city database is installed.
+- checking: Properly detect case where IPv6 is not supported.
+  Closes: SF bug #3167249
 
 
 6.2 "Despicable Me" (released 6.1.2011)
diff --git a/linkcheck/socketutil.py b/linkcheck/socketutil.py
index 1a5b880b..04864b3f 100644
--- a/linkcheck/socketutil.py
+++ b/linkcheck/socketutil.py
@@ -30,7 +30,8 @@ if socket.has_ipv6:
         # only catch these one:
         # socket.error: (97, 'Address family not supported by protocol')
         # socket.error: (10047, 'Address family not supported by protocol')
-        if msg.args[0] not in (97, 10047):
+        # socket.error: (43, 'Protocol not supported')
+        if msg.args[0] not in (97, 10047, 43):
             raise