diff --git a/httpx/_client.py b/httpx/_client.py
index e5b53d4f5f..5e2b3c6b68 100644
--- a/httpx/_client.py
+++ b/httpx/_client.py
@@ -382,7 +382,7 @@ def _build_request_auth(
             return BasicAuth(username=username, password=password)
 
         if self.trust_env and "Authorization" not in request.headers:
-            credentials = self._netrc.get_credentials(request.url.authority)
+            credentials = self._netrc.get_credentials(request.url.host)
             if credentials is not None:
                 return BasicAuth(username=credentials[0], password=credentials[1])
 
diff --git a/httpx/_utils.py b/httpx/_utils.py
index aa670724cb..75c92fd827 100644
--- a/httpx/_utils.py
+++ b/httpx/_utils.py
@@ -147,13 +147,11 @@ def netrc_info(self) -> typing.Optional[netrc.netrc]:
                     pass
         return self._netrc_info
 
-    def get_credentials(
-        self, authority: str
-    ) -> typing.Optional[typing.Tuple[str, str]]:
+    def get_credentials(self, host: str) -> typing.Optional[typing.Tuple[str, str]]:
         if self.netrc_info is None:
             return None
 
-        auth_info = self.netrc_info.authenticators(authority)
+        auth_info = self.netrc_info.authenticators(host)
         if auth_info is None or auth_info[2] is None:
             return None
         return (auth_info[0], auth_info[2])