diff --git a/lib/c-hyper.c b/lib/c-hyper.c
index 93b912c47c..b098b70792 100644
--- a/lib/c-hyper.c
+++ b/lib/c-hyper.c
@@ -1013,10 +1013,8 @@ CURLcode Curl_http(struct Curl_easy *data, bool *done)
     /* For HTTP/2, we show the Host: header as if we sent it, to make it look
        like for HTTP/1 but it isn't actually sent since :authority is then
        used. */
-    result = Curl_debug(data, CURLINFO_HEADER_OUT, data->state.aptr.host,
-                        strlen(data->state.aptr.host));
-    if(result)
-      goto error;
+    Curl_debug(data, CURLINFO_HEADER_OUT, data->state.aptr.host,
+               strlen(data->state.aptr.host));
   }
 
   if(data->state.aptr.proxyuserpwd) {
@@ -1136,9 +1134,7 @@ CURLcode Curl_http(struct Curl_easy *data, bool *done)
   if(result)
     goto error;
 
-  result = Curl_debug(data, CURLINFO_HEADER_OUT, (char *)"\r\n", 2);
-  if(result)
-    goto error;
+  Curl_debug(data, CURLINFO_HEADER_OUT, (char *)"\r\n", 2);
 
   data->req.upload_chunky = FALSE;
   sendtask = hyper_clientconn_send(client, req);
diff --git a/lib/http_proxy.c b/lib/http_proxy.c
index a69cff2b3c..1f87f6c62a 100644
--- a/lib/http_proxy.c
+++ b/lib/http_proxy.c
@@ -393,8 +393,8 @@ static CURLcode CONNECT(struct Curl_easy *data,
 
         if(!result)
           /* send to debug callback! */
-          result = Curl_debug(data, CURLINFO_HEADER_OUT,
-                              k->upload_fromhere, bytes_written);
+          Curl_debug(data, CURLINFO_HEADER_OUT,
+                     k->upload_fromhere, bytes_written);
 
         s->nsend -= bytes_written;
         k->upload_fromhere += bytes_written;
diff --git a/lib/sendf.c b/lib/sendf.c
index d19fb55233..52788fd5fc 100644
--- a/lib/sendf.c
+++ b/lib/sendf.c
@@ -714,16 +714,15 @@ CURLcode Curl_read(struct Curl_easy *data,   /* transfer */
 }
 
 /* return 0 on success */
-int Curl_debug(struct Curl_easy *data, curl_infotype type,
-               char *ptr, size_t size)
+void Curl_debug(struct Curl_easy *data, curl_infotype type,
+                char *ptr, size_t size)
 {
-  int rc = 0;
   if(data->set.verbose) {
     static const char s_infotype[CURLINFO_END][3] = {
       "* ", "< ", "> ", "{ ", "} ", "{ ", "} " };
     if(data->set.fdebug) {
       Curl_set_in_callback(data, true);
-      rc = (*data->set.fdebug)(data, type, ptr, size, data->set.debugdata);
+      (void)(*data->set.fdebug)(data, type, ptr, size, data->set.debugdata);
       Curl_set_in_callback(data, false);
     }
     else {
@@ -739,5 +738,4 @@ int Curl_debug(struct Curl_easy *data, curl_infotype type,
       }
     }
   }
-  return rc;
 }
diff --git a/lib/sendf.h b/lib/sendf.h
index 075d70eaad..7c4c1280a0 100644
--- a/lib/sendf.h
+++ b/lib/sendf.h
@@ -89,8 +89,8 @@ CURLcode Curl_write_plain(struct Curl_easy *data,
                           ssize_t *written);
 
 /* the function used to output verbose information */
-int Curl_debug(struct Curl_easy *data, curl_infotype type,
-               char *ptr, size_t size);
+void Curl_debug(struct Curl_easy *data, curl_infotype type,
+                char *ptr, size_t size);
 
 
 #endif /* HEADER_CURL_SENDF_H */