diff -Naur Python-3.7.0-orig/setup.py Python-3.7.0/setup.py
--- Python-3.7.0-orig/setup.py	2018-07-12 10:21:22.900756300 +0300
+++ Python-3.7.0/setup.py	2018-07-12 10:21:28.345165900 +0300
@@ -2192,6 +2192,8 @@
         openssl_includes = split_var('OPENSSL_INCLUDES', '-I')
         openssl_libdirs = split_var('OPENSSL_LDFLAGS', '-L')
         openssl_libs = split_var('OPENSSL_LIBS', '-l')
+        if host_platform.startswith(('mingw', 'win')):
+            openssl_libs += ['ws2_32']
         if not openssl_libs:
             # libssl and libcrypto not found
             return None, None