diff --git a/CMakeLists.txt b/CMakeLists.txt
index a14af9083e50cb..dba2b0fd570f96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -675,9 +675,7 @@ if(NOT CURL_DISABLE_LDAP)
   endif()
 
   # Now that we know, we're not using windows LDAP...
-  if(USE_WIN32_LDAP)
-    check_include_file_concat("winldap.h" HAVE_WINLDAP_H)
-  else()
+  if(NOT USE_WIN32_LDAP)
     # Check for LDAP
     set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_LIBRARIES})
     check_library_exists_concat(${CMAKE_LDAP_LIB} ldap_init HAVE_LIBLDAP)
diff --git a/acinclude.m4 b/acinclude.m4
index b3025afe7336b5..5dbdd93fef0770 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -345,46 +345,6 @@ AC_DEFUN([CURL_CHECK_HEADER_WINCRYPT], [
 ])
 
 
-dnl CURL_CHECK_HEADER_WINLDAP
-dnl -------------------------------------------------
-dnl Check for compilable and valid winldap.h header
-
-AC_DEFUN([CURL_CHECK_HEADER_WINLDAP], [
-  AC_REQUIRE([CURL_CHECK_HEADER_WINDOWS])dnl
-  AC_CACHE_CHECK([for winldap.h], [curl_cv_header_winldap_h], [
-    AC_COMPILE_IFELSE([
-      AC_LANG_PROGRAM([[
-#undef inline
-#ifdef HAVE_WINDOWS_H
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#include <windows.h>
-#endif
-#include <winldap.h>
-      ]],[[
-#if defined(__CYGWIN__) || defined(__CEGCC__)
-        HAVE_WINLDAP_H shall not be defined.
-#else
-        LDAP *ldp = ldap_init("dummy", LDAP_PORT);
-        ULONG res = ldap_unbind(ldp);
-#endif
-      ]])
-    ],[
-      curl_cv_header_winldap_h="yes"
-    ],[
-      curl_cv_header_winldap_h="no"
-    ])
-  ])
-  case "$curl_cv_header_winldap_h" in
-    yes)
-      AC_DEFINE_UNQUOTED(HAVE_WINLDAP_H, 1,
-        [Define to 1 if you have the winldap.h header file.])
-      ;;
-  esac
-])
-
-
 dnl CURL_CHECK_HEADER_LBER
 dnl -------------------------------------------------
 dnl Check for compilable and valid lber.h header,
@@ -612,9 +572,7 @@ AC_DEFUN([CURL_CHECK_LIBS_WINLDAP], [
 #define WIN32_LEAN_AND_MEAN
 #endif
 #include <windows.h>
-#ifdef HAVE_WINLDAP_H
 #include <winldap.h>
-#endif
 #ifdef HAVE_WINBER_H
 #include <winber.h>
 #endif
diff --git a/configure.ac b/configure.ac
index 0f316d0bb87872..afbc0419e46a1e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -677,13 +677,11 @@ case X-"$curl_cv_native_windows" in
     CURL_CHECK_HEADER_WINSOCK2
     CURL_CHECK_HEADER_WS2TCPIP
     CURL_CHECK_HEADER_WINCRYPT
-    CURL_CHECK_HEADER_WINLDAP
     ;;
   *)
     curl_cv_header_winsock2_h="no"
     curl_cv_header_ws2tcpip_h="no"
     curl_cv_header_wincrypt_h="no"
-    curl_cv_header_winldap_h="no"
     ;;
 esac
 CURL_CHECK_WIN32_LARGEFILE
diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake
index eca71bdef6da14..9c78586133c8b7 100644
--- a/lib/curl_config.h.cmake
+++ b/lib/curl_config.h.cmake
@@ -577,9 +577,6 @@
 /* Define to 1 if you have the windows.h header file. */
 #cmakedefine HAVE_WINDOWS_H 1
 
-/* Define to 1 if you have the winldap.h header file. */
-#cmakedefine HAVE_WINLDAP_H 1
-
 /* Define to 1 if you have the winsock2.h header file. */
 #cmakedefine HAVE_WINSOCK2_H 1