diff --git a/lib/http2.c b/lib/http2.c
index 4ce618a5b..cdabb6f6c 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -769,7 +769,7 @@ static int set_transfer_url(struct Curl_easy *data,
 
   v = curl_pushheader_byname(hp, HTTP_PSEUDO_AUTHORITY);
   if(v) {
-    uc = curl_url_set_authority(u, v, CURLU_DISALLOW_USER);
+    uc = Curl_url_set_authority(u, v, CURLU_DISALLOW_USER);
     if(uc) {
       rc = 2;
       goto fail;
diff --git a/lib/urlapi-int.h b/lib/urlapi-int.h
index ff9f79907..d6e240aa3 100644
--- a/lib/urlapi-int.h
+++ b/lib/urlapi-int.h
@@ -28,7 +28,7 @@
 size_t Curl_is_absolute_url(const char *url, char *buf, size_t buflen,
                             bool guess_scheme);
 
-CURLUcode curl_url_set_authority(CURLU *u, const char *authority,
+CURLUcode Curl_url_set_authority(CURLU *u, const char *authority,
                                  unsigned int flags);
 
 #ifdef DEBUGBUILD
diff --git a/lib/urlapi.c b/lib/urlapi.c
index bdbe6c8a7..192fb165b 100644
--- a/lib/urlapi.c
+++ b/lib/urlapi.c
@@ -817,7 +817,7 @@ out:
   return result;
 }
 
-CURLUcode curl_url_set_authority(CURLU *u, const char *authority,
+CURLUcode Curl_url_set_authority(CURLU *u, const char *authority,
                                  unsigned int flags)
 {
   CURLUcode result;