diff --git a/deps/rabbit_common/src/rabbit_data_coercion.erl b/deps/rabbit_common/src/rabbit_data_coercion.erl
index 08d12d809014..d8c79969c91a 100644
--- a/deps/rabbit_common/src/rabbit_data_coercion.erl
+++ b/deps/rabbit_common/src/rabbit_data_coercion.erl
@@ -18,12 +18,27 @@ to_binary(Val) when is_integer(Val)  -> integer_to_binary(Val);
 to_binary(Val) when is_function(Val) -> list_to_binary(io_lib:format("~w", [Val]));
 to_binary(Val)                       -> Val.
 
--spec to_list(Val :: integer() | list() | binary() | atom() | map()) -> list().
+-spec to_list(Val :: integer() | list() | binary() | atom() | map() | inet:ip_address()) -> list().
 to_list(Val) when is_list(Val)    -> Val;
 to_list(Val) when is_map(Val)     -> maps:to_list(Val);
 to_list(Val) when is_atom(Val)    -> atom_to_list(Val);
 to_list(Val) when is_binary(Val)  -> binary_to_list(Val);
-to_list(Val) when is_integer(Val) -> integer_to_list(Val).
+to_list(Val) when is_integer(Val) -> integer_to_list(Val);
+to_list({V0, V1, V2, V3}=Val) when (is_integer(V0) andalso (V0 >=0 andalso V0 =< 255)) andalso
+                                   (is_integer(V1) andalso (V1 >=0 andalso V1 =< 255)) andalso
+                                   (is_integer(V2) andalso (V2 >=0 andalso V2 =< 255)) andalso
+                                   (is_integer(V3) andalso (V3 >=0 andalso V3 =< 255)) ->
+    io_lib:format("~w", [Val]);
+to_list({V0, V1, V2, V3, V4, V5, V6, V7}=Val)
+  when (is_integer(V0) andalso (V0 >=0 andalso V0 =< 65535)) andalso
+       (is_integer(V1) andalso (V1 >=0 andalso V1 =< 65535)) andalso
+       (is_integer(V2) andalso (V2 >=0 andalso V2 =< 65535)) andalso
+       (is_integer(V3) andalso (V3 >=0 andalso V3 =< 65535)) andalso
+       (is_integer(V4) andalso (V4 >=0 andalso V4 =< 65535)) andalso
+       (is_integer(V5) andalso (V5 >=0 andalso V5 =< 65535)) andalso
+       (is_integer(V6) andalso (V6 >=0 andalso V6 =< 65535)) andalso
+       (is_integer(V7) andalso (V7 >=0 andalso V7 =< 65535)) ->
+    io_lib:format("~w", [Val]).
 
 -spec to_atom(Val :: atom() | list() | binary()) -> atom().
 to_atom(Val) when is_atom(Val)   -> Val;
diff --git a/deps/rabbitmq_auth_backend_http/src/rabbit_auth_backend_http.erl b/deps/rabbitmq_auth_backend_http/src/rabbit_auth_backend_http.erl
index 04ae9acefc57..66ee5777210d 100644
--- a/deps/rabbitmq_auth_backend_http/src/rabbit_auth_backend_http.erl
+++ b/deps/rabbitmq_auth_backend_http/src/rabbit_auth_backend_http.erl
@@ -200,7 +200,7 @@ parse_peeraddr(unknown) ->
 parse_peeraddr(PeerAddr) ->
     handle_inet_ntoa_peeraddr(inet:ntoa(PeerAddr), PeerAddr).
 
--spec handle_inet_ntoa_peeraddr({'error', term()} | string(), inet:ip_address()) -> string().
+-spec handle_inet_ntoa_peeraddr({'error', term()} | string(), inet:ip_address() | unknown) -> string().
 handle_inet_ntoa_peeraddr({error, einval}, PeerAddr) ->
     rabbit_data_coercion:to_list(PeerAddr);
 handle_inet_ntoa_peeraddr(PeerAddrStr, _PeerAddr0) ->