diff --git a/lib/curl_gethostname.c b/lib/curl_gethostname.c
index 8337c72e8..5f1c9998f 100644
--- a/lib/curl_gethostname.c
+++ b/lib/curl_gethostname.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -48,7 +48,7 @@
  * For libcurl static library release builds no overriding takes place.
  */
 
-int Curl_gethostname(char *name, GETHOSTNAME_TYPE_ARG2 namelen)
+int Curl_gethostname(char * const name, GETHOSTNAME_TYPE_ARG2 namelen)
 {
 #ifndef HAVE_GETHOSTNAME
 
diff --git a/lib/curl_gethostname.h b/lib/curl_gethostname.h
index 8ae15e6c1..2d78bc54d 100644
--- a/lib/curl_gethostname.h
+++ b/lib/curl_gethostname.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -26,6 +26,6 @@
 #define HOSTNAME_MAX 1024
 
 /* This returns the local machine's un-qualified hostname */
-int Curl_gethostname(char *name, GETHOSTNAME_TYPE_ARG2 namelen);
+int Curl_gethostname(char * const name, GETHOSTNAME_TYPE_ARG2 namelen);
 
 #endif /* HEADER_CURL_GETHOSTNAME_H */