diff --git a/api/src/main/java/org/asynchttpclient/Realm.java b/api/src/main/java/org/asynchttpclient/Realm.java
index 8676bdc2eb..cf2e07a3f6 100644
--- a/api/src/main/java/org/asynchttpclient/Realm.java
+++ b/api/src/main/java/org/asynchttpclient/Realm.java
@@ -400,7 +400,10 @@ public RealmBuilder setUsePreemptiveAuth(boolean usePreemptiveAuth) {
         public RealmBuilder parseWWWAuthenticateHeader(String headerLine) {
             setRealmName(match(headerLine, "realm"));
             setNonce(match(headerLine, "nonce"));
-            setAlgorithm(match(headerLine, "algorithm"));
+            String algorithm = match(headerLine, "algorithm");
+            if (isNonEmpty(algorithm)) {
+                setAlgorithm(algorithm);
+            }
             setOpaque(match(headerLine, "opaque"));
             setQop(match(headerLine, "qop"));
             if (isNonEmpty(getNonce())) {
diff --git a/providers/netty/src/main/java/org/asynchttpclient/providers/netty/handler/HttpProtocol.java b/providers/netty/src/main/java/org/asynchttpclient/providers/netty/handler/HttpProtocol.java
index 61bbe02c0a..032a3d9ae1 100644
--- a/providers/netty/src/main/java/org/asynchttpclient/providers/netty/handler/HttpProtocol.java
+++ b/providers/netty/src/main/java/org/asynchttpclient/providers/netty/handler/HttpProtocol.java
@@ -227,7 +227,7 @@ private boolean handleUnauthorizedAndExit(int statusCode, Realm realm, final Req
                             .parseWWWAuthenticateHeader(authenticateHeaders.get(0)).build();
                 }
 
-                Realm nr = new Realm.RealmBuilder().clone(newRealm).setUri(URI.create(request.getUrl()).getPath()).build();
+                Realm nr = new Realm.RealmBuilder().clone(newRealm).setUri(request.getURI().getPath()).build();
                 final Request nextRequest = new RequestBuilder(future.getRequest()).setHeaders(request.getHeaders()).setRealm(nr).build();
 
                 LOGGER.debug("Sending authentication to {}", request.getUrl());