diff --git a/auto/lib/openssl/conf b/auto/lib/openssl/conf
index 64f2ce0..c57a7c8 100644
--- a/auto/lib/openssl/conf
+++ b/auto/lib/openssl/conf
@@ -19,6 +19,8 @@
 
             # libeay32.lib requires gdi32.lib
             CORE_LIBS="$CORE_LIBS gdi32.lib"
+            # OpenSSL 1.0.0 requires crypt32.lib
+            CORE_LIBS="$CORE_LIBS crypt32.lib"
         ;;
 
         *)
diff --git a/auto/lib/openssl/makefile.bcc b/auto/lib/openssl/makefile.bcc
index 679e7fe..5938cbf 100644
--- a/auto/lib/openssl/makefile.bcc
+++ b/auto/lib/openssl/makefile.bcc
@@ -5,8 +5,7 @@
 all:
 	cd $(OPENSSL)
 
-	perl Configure BC-32 no-shared --prefix=openssl -DNO_SYS_TYPES_H \
-		$(OPENSSL_OPT)
+	perl Configure BC-32 no-shared --prefix=openssl $(OPENSSL_OPT)
 
 	ms\do_nasm
 
diff --git a/auto/lib/openssl/makefile.msvc b/auto/lib/openssl/makefile.msvc
index 0e45c48..379b95d 100644
--- a/auto/lib/openssl/makefile.msvc
+++ b/auto/lib/openssl/makefile.msvc
@@ -5,8 +5,7 @@
 all:
 	cd $(OPENSSL)
 
-	perl Configure VC-WIN32 no-shared --prefix=openssl -DNO_SYS_TYPES_H \
-		$(OPENSSL_OPT)
+	perl Configure VC-WIN32 no-shared --prefix=openssl $(OPENSSL_OPT)
 
 	ms\do_ms
 
diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 4a05444..5eab4af 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -561,6 +561,9 @@
 #if (NGX_DEBUG)
         {
         char         buf[129], *s, *d;
+#if OPENSSL_VERSION_NUMBER >= 0x1000000fL
+        const
+#endif
         SSL_CIPHER  *cipher;
 
         cipher = SSL_get_current_cipher(c->ssl->connection);