diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1d176b..6a66091 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -243,7 +243,6 @@
                    "${OPENSSL_INCLUDE_DIR}" ${OPENSSL_LIBRARIES} ${SERF_STANDARD_LIBRARIES})
 CheckFunctionMacro("SSL_library_init" "SERF_HAVE_OPENSSL_SSL_LIBRARY_INIT" "openssl/ssl.h"
                    "${OPENSSL_INCLUDE_DIR}" ${OPENSSL_LIBRARIES} ${SERF_STANDARD_LIBRARIES})
-CheckHeader("openssl/applink.c" "SERF_HAVE_OPENSSL_APPLINK_C" ${OPENSSL_INCLUDE_DIR})
 CheckHeader("stdbool.h" "HAVE_STDBOOL_H=1")
 CheckType("OSSL_HANDSHAKE_STATE" "openssl/ssl.h" "SERF_HAVE_OSSL_HANDSHAKE_STATE" ${OPENSSL_INCLUDE_DIR})
 
diff --git a/SConstruct b/SConstruct
index d94d493..f2cff14 100644
--- a/SConstruct
+++ b/SConstruct
@@ -507,8 +507,6 @@
 # Check for OpenSSL functions which are only available in some of
 # the versions we support. Also handles forks like LibreSSL.
 conf = Configure(env)
-if conf.CheckCHeader('openssl/applink.c'):
-  env.Append(CPPDEFINES=['SERF_HAVE_OPENSSL_APPLINK_C'])
 if not conf.CheckFunc('BIO_set_init', '#include <openssl/crypto.h>'):
   env.Append(CPPDEFINES=['SERF_NO_SSL_BIO_WRAPPERS'])
 if not conf.CheckFunc('X509_STORE_get0_param', '#include <openssl/crypto.h>'):
diff --git a/test/test_ssl.c b/test/test_ssl.c
index 8dc04c9..9e8036c 100644
--- a/test/test_ssl.c
+++ b/test/test_ssl.c
@@ -35,19 +35,6 @@
 #include <openssl/ocsp.h>
 #endif
 
-#if defined(WIN32) && defined(_DEBUG) && defined(SERF_HAVE_OPENSSL_APPLINK_C)
-/* Include this file to allow running a Debug build of serf with a Release
-   build of OpenSSL. Note: his file is not available on OpenSSL 1.1.x. */
-#if defined(_MSC_VER) && _MSC_VER >= 1400
-#pragma warning(push)
-#pragma warning(disable: 4152)
-#endif
-#include <openssl/applink.c>
-#if defined(_MSC_VER) && _MSC_VER >= 1400
-#pragma warning(pop)
-#endif
-#endif
-
 /* Test setting up the openssl library. */
 static void test_ssl_init(CuTest *tc)
 {