diff --git a/lib/http_negotiate.c b/lib/http_negotiate.c
index 9e1a83ccc..92113eb07 100644
--- a/lib/http_negotiate.c
+++ b/lib/http_negotiate.c
@@ -53,14 +53,16 @@ CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
   if(proxy) {
     userp = conn->proxyuser;
     passwdp = conn->proxypasswd;
-    service = data->set.str[STRING_PROXY_SERVICE_NAME];
+    service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
+              data->set.str[STRING_PROXY_SERVICE_NAME] : "HTTP";
     host = conn->proxy.name;
     neg_ctx = &data->state.proxyneg;
   }
   else {
     userp = conn->user;
     passwdp = conn->passwd;
-    service = data->set.str[STRING_SERVICE_NAME];
+    service = data->set.str[STRING_SERVICE_NAME] ?
+              data->set.str[STRING_SERVICE_NAME] : "HTTP";
     host = conn->host.name;
     neg_ctx = &data->state.negotiate;
   }
diff --git a/lib/url.c b/lib/url.c
index d20c36928..5705252c4 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -576,18 +576,6 @@ CURLcode Curl_init_userdefined(struct UserDefined *set)
                      CURL_DEFAULT_SOCKS5_GSSAPI_SERVICE);
   if(result)
     return result;
-
-  /* set default negotiate proxy service name */
-  result = setstropt(&set->str[STRING_PROXY_SERVICE_NAME],
-                     CURL_DEFAULT_PROXY_SERVICE_NAME);
-  if(result)
-    return result;
-
-  /* set default negotiate service name */
-  result = setstropt(&set->str[STRING_SERVICE_NAME],
-                     CURL_DEFAULT_SERVICE_NAME);
-  if(result)
-    return result;
 #endif
 
   /* This is our preferred CA cert bundle/path since install time */
diff --git a/lib/url.h b/lib/url.h
index 554680f8e..e7a9ddf08 100644
--- a/lib/url.h
+++ b/lib/url.h
@@ -69,9 +69,6 @@ void Curl_close_connections(struct SessionHandle *data);
 #define CURL_DEFAULT_PROXY_PORT 1080 /* default proxy port unless specified */
 #define CURL_DEFAULT_SOCKS5_GSSAPI_SERVICE "rcmd" /* default socks5 gssapi
                                                      service */
-#define CURL_DEFAULT_PROXY_SERVICE_NAME "HTTP" /* default negotiate proxy
-                                                  service */
-#define CURL_DEFAULT_SERVICE_NAME "HTTP"  /* default negotiate service */
 
 CURLcode Curl_connected_proxy(struct connectdata *conn, int sockindex);