diff --git a/patches/win_bio_sock_init.diff b/patches/win_bio_sock_init.diff
new file mode 100644
index 0000000..e0221b9
--- /dev/null
+++ b/patches/win_bio_sock_init.diff
@@ -0,0 +1,44 @@
+diff --git a/src/usr.bin/openssl/openssl.c b/src/usr.bin/openssl/openssl.c
+index e7dd11c..cfd4593 100644
+--- a/src/usr.bin/openssl/openssl.c
++++ b/src/usr.bin/openssl/openssl.c
+@@ -253,6 +253,11 @@ main(int argc, char **argv)
+ 	arg.data = NULL;
+ 	arg.count = 0;
+ 
++	if (BIO_sock_init() != 1) {
++		fprintf(stderr, "BIO_sock_init failed\n");
++		exit(1);
++	}
++
+ 	bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
+ 	if (bio_err == NULL) {
+ 		fprintf(stderr, "openssl: failed to initialise bio_err\n");
+diff --git a/src/usr.bin/openssl/s_socket.c b/src/usr.bin/openssl/s_socket.c
+index 3b96b1a..2ce31eb 100644
+--- a/src/usr.bin/openssl/s_socket.c
++++ b/src/usr.bin/openssl/s_socket.c
+@@ -85,11 +85,6 @@ init_client(int *sock, char *host, char *port, int type, int af)
+ 	struct addrinfo hints, *ai_top, *ai;
+ 	int i, s;
+ 
+-	if (BIO_sock_init() != 1) {
+-		BIO_printf(bio_err, "BIO_sock_init failed\n");
+-		return (0);
+-	}
+-
+ 	memset(&hints, '\0', sizeof(hints));
+ 	hints.ai_family = af;
+ 	hints.ai_socktype = type;
+@@ -181,11 +176,6 @@ init_server_long(int *sock, int port, char *ip, int type)
+ 	struct sockaddr_in server;
+ 	int s = -1;
+ 
+-	if (BIO_sock_init() != 1) {
+-		BIO_printf(bio_err, "BIO_sock_init failed\n");
+-		return (0);
+-	}
+-
+ 	memset((char *) &server, 0, sizeof(server));
+ 	server.sin_family = AF_INET;
+ 	server.sin_port = htons((unsigned short) port);
diff --git a/update.sh b/update.sh
index 29012ad..e007f31 100755
--- a/update.sh
+++ b/update.sh
@@ -18,15 +18,15 @@ fi
  git pull --rebase)
 
 # setup source paths
-dir=`pwd`
-libc_src=$dir/openbsd/src/lib/libc
-libc_regress=$dir/openbsd/src/regress/lib/libc
-libcrypto_src=$dir/openbsd/src/lib/libcrypto
-libcrypto_regress=$dir/openbsd/src/regress/lib/libcrypto
-libssl_src=$dir/openbsd/src/lib/libssl
-libssl_regress=$dir/openbsd/src/regress/lib/libssl
-libtls_src=$dir/openbsd/src/lib/libtls
-openssl_app_src=$dir/openbsd/src/usr.bin/openssl
+CWD=`pwd`
+libc_src=$CWD/openbsd/src/lib/libc
+libc_regress=$CWD/openbsd/src/regress/lib/libc
+libcrypto_src=$CWD/openbsd/src/lib/libcrypto
+libcrypto_regress=$CWD/openbsd/src/regress/lib/libcrypto
+libssl_src=$CWD/openbsd/src/lib/libssl
+libssl_regress=$CWD/openbsd/src/regress/lib/libssl
+libtls_src=$CWD/openbsd/src/lib/libtls
+openssl_app_src=$CWD/openbsd/src/usr.bin/openssl
 
 # load library versions
 source $libcrypto_src/crypto/shlib_version
@@ -184,6 +184,8 @@ for i in `awk '/SOURCES|HEADERS/ { print $3 }' apps/Makefile.am` ; do
 		$CP $openssl_app_src/$i apps
 	fi
 done
+# patch for openssl(1) oscp on windows
+(cd apps; patch -p5 < $CWD/patches/win_bio_sock_init.diff)
 
 # copy libssl source
 echo "copying libssl source"