diff --git a/lib/Makefile.am b/lib/Makefile.am
index 8a2bd4e68e..b2e64c788e 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -28,7 +28,7 @@ include Makefile.inc
 
 CMAKE_DIST = CMakeLists.txt curl_config-cmake.h.in
 
-EXTRA_DIST = config-mac.h config-os400.h config-riscos.h config-win32.h         \
+EXTRA_DIST = config-mac.h config-os400.h config-win32.h                         \
   curl_config.h.in $(LIB_RCFILES) libcurl.def $(CMAKE_DIST) Makefile.soname     \
   optiontable.pl
 
diff --git a/lib/config-riscos.h b/lib/config-riscos.h
deleted file mode 100644
index 358544fb3c..0000000000
--- a/lib/config-riscos.h
+++ /dev/null
@@ -1,138 +0,0 @@
-#ifndef HEADER_CURL_CONFIG_RISCOS_H
-#define HEADER_CURL_CONFIG_RISCOS_H
-/***************************************************************************
- *                                  _   _ ____  _
- *  Project                     ___| | | |  _ \| |
- *                             / __| | | | |_) | |
- *                            | (__| |_| |  _ <| |___
- *                             \___|\___/|_| \_\_____|
- *
- * Copyright (C) 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
- * are also available at https://curl.se/docs/copyright.html.
- *
- * You may opt to use, copy, modify, merge, publish, distribute and/or sell
- * copies of the Software, and permit persons to whom the Software is
- * furnished to do so, under the terms of the COPYING file.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- * SPDX-License-Identifier: curl
- *
- ***************************************************************************/
-
-/* ================================================================ */
-/*               Hand crafted config file for RISC OS               */
-/* ================================================================ */
-
-/* Define cpu-machine-OS */
-#ifndef CURL_OS
-#define CURL_OS "ARM-RISC OS"
-#endif
-
-/* Define if you want the built-in manual */
-#define USE_MANUAL
-
-/* Define if struct sockaddr_in6 has the sin6_scope_id member */
-#define HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID 1
-
-/* Define if you have the alarm function. */
-#define HAVE_ALARM
-
-/* Define if you have the <arpa/inet.h> header file. */
-#define HAVE_ARPA_INET_H
-
-/* Define if you have the <fcntl.h> header file. */
-#define HAVE_FCNTL_H
-
-/* Define if getaddrinfo exists and works */
-#define HAVE_GETADDRINFO
-
-/* Define if you have the `gethostname' function. */
-#define HAVE_GETHOSTNAME
-
-/* Define if you have the `gettimeofday' function. */
-#define HAVE_GETTIMEOFDAY
-
-/* Define if you have the `timeval' struct. */
-#define HAVE_STRUCT_TIMEVAL
-
-/* Define if you have the <netdb.h> header file. */
-#define HAVE_NETDB_H
-
-/* Define if you have the <netinet/in.h> header file. */
-#define HAVE_NETINET_IN_H
-
-/* Define if you have the <net/if.h> header file. */
-#define HAVE_NET_IF_H
-
-/* Define if you have the `signal' function. */
-#define HAVE_SIGNAL
-
-/* Define if you have the `socket' function. */
-#define HAVE_SOCKET
-
-/* Define if you have the `stricmp' function. */
-#define HAVE_STRICMP
-
-/* Define if you have the <sys/types.h> header file. */
-#define HAVE_SYS_TYPES_H
-
-/* Define if you have the <termios.h> header file. */
-#define HAVE_TERMIOS_H
-
-/* Define if you have the <unistd.h> header file. */
-#define HAVE_UNISTD_H
-
-/* The size of `int', as computed by sizeof. */
-#define SIZEOF_INT 4
-
-/* The size of `size_t', as computed by sizeof. */
-#define SIZEOF_SIZE_T 4
-
-/* Define if you have a working ioctl FIONBIO function. */
-#define HAVE_IOCTL_FIONBIO
-
-/* to disable LDAP */
-#define CURL_DISABLE_LDAP
-
-/* Define if you have the recv function. */
-#define HAVE_RECV 1
-
-/* Define to the type of arg 1 for recv. */
-#define RECV_TYPE_ARG1 int
-
-/* Define to the type of arg 2 for recv. */
-#define RECV_TYPE_ARG2 void *
-
-/* Define to the type of arg 3 for recv. */
-#define RECV_TYPE_ARG3 size_t
-
-/* Define to the type of arg 4 for recv. */
-#define RECV_TYPE_ARG4 int
-
-/* Define to the function return type for recv. */
-#define RECV_TYPE_RETV ssize_t
-
-/* Define if you have the send function. */
-#define HAVE_SEND 1
-
-/* Define to the type of arg 1 for send. */
-#define SEND_TYPE_ARG1 int
-
-/* Define to the type of arg 2 for send. */
-#define SEND_TYPE_ARG2 void *
-
-/* Define to the type of arg 3 for send. */
-#define SEND_TYPE_ARG3 size_t
-
-/* Define to the type of arg 4 for send. */
-#define SEND_TYPE_ARG4 int
-
-/* Define to the function return type for send. */
-#define SEND_TYPE_RETV ssize_t
-
-#endif /* HEADER_CURL_CONFIG_RISCOS_H */
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 38b4706cb9..d43baf3b38 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -149,10 +149,6 @@
 #  include "config-mac.h"
 #endif
 
-#ifdef __riscos__
-#  include "config-riscos.h"
-#endif
-
 #ifdef __OS400__
 #  include "config-os400.h"
 #endif