diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f284bd9f1..08c81451b9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1387,9 +1387,7 @@ if(CMAKE_COMPILER_IS_GNUCC AND APPLE)
 endif()
 
 # TODO test which of these headers are required
-if(WIN32)
-  set(CURL_PULL_WS2TCPIP_H 1)
-else()
+if(NOT WIN32)
   set(CURL_PULL_SYS_TYPES_H ${HAVE_SYS_TYPES_H})
   set(CURL_PULL_SYS_SOCKET_H ${HAVE_SYS_SOCKET_H})
   set(CURL_PULL_SYS_POLL_H ${HAVE_SYS_POLL_H})
diff --git a/include/curl/system.h b/include/curl/system.h
index f2554b4a90..81a1b817df 100644
--- a/include/curl/system.h
+++ b/include/curl/system.h
@@ -184,9 +184,8 @@
 #  define CURL_FORMAT_CURL_OFF_TU    PRIu64
 #  define CURL_SUFFIX_CURL_OFF_T     LL
 #  define CURL_SUFFIX_CURL_OFF_TU    ULL
-#  define CURL_TYPEOF_CURL_SOCKLEN_T socklen_t
+#  define CURL_TYPEOF_CURL_SOCKLEN_T int
 #  define CURL_PULL_SYS_TYPES_H      1
-#  define CURL_PULL_WS2TCPIP_H       1
 
 #elif defined(__VMS)
 #  if defined(__VAX)
@@ -417,15 +416,6 @@
 #define CURL_PULL_SYS_POLL_H
 #endif
 
-
-/* CURL_PULL_WS2TCPIP_H is defined above when inclusion of header file  */
-/* ws2tcpip.h is required here to properly make type definitions below. */
-#ifdef CURL_PULL_WS2TCPIP_H
-#  include <winsock2.h>
-#  include <windows.h>
-#  include <ws2tcpip.h>
-#endif
-
 /* CURL_PULL_SYS_TYPES_H is defined above when inclusion of header file  */
 /* sys/types.h is required here to properly make type definitions below. */
 #ifdef CURL_PULL_SYS_TYPES_H