diff --git a/Makefile.nmake b/Makefile.nmake
index f0ec1023..39efbc91 100644
--- a/Makefile.nmake
+++ b/Makefile.nmake
@@ -1,10 +1,26 @@
-# WATCH OUT!  This makefile is a work in progress.
+# WATCH OUT!  This makefile is a work in progress.             -*- makefile -*-
 #
 # I'm not very knowledgeable about MSVC and nmake beyond their most basic
 # aspects.  If anything here looks wrong to you, please let me know.
 
+# If OPENSSL_DIR is not set, builds without OpenSSL support.  If you want
+# OpenSSL support, you can set the OPENSSL_DIR variable to where you
+# installed OpenSSL.  This can be done in the environment:
+#   set OPENSSL_DIR=c:\openssl
+# Or on the nmake command line:
+#   nmake OPENSSL_DIR=C:\openssl -f Makefile.nmake
+# Or by uncommenting the following line here in the makefile...
+
+# OPENSSL_DIR=c:\openssl
+
+!IFDEF OPENSSL_DIR
+SSL_CFLAGS=/I$(OPENSSL_DIR)\include /DEVENT__HAVE_OPENSSL
+!ELSE
+SSL_CFLAGS=
+!ENDIF
+
 # Needed for correctness
-CFLAGS=/IWIN32-Code /Iinclude /Icompat /DHAVE_CONFIG_H /I.
+CFLAGS=/IWIN32-Code /Iinclude /Icompat /DHAVE_CONFIG_H /I. $(SSL_CFLAGS)
 
 # For optimization and warnings
 CFLAGS=$(CFLAGS) /Ox /W3 /wd4996 /nologo
@@ -21,8 +37,16 @@ WIN_OBJS=win32select.obj evthread_win32.obj buffer_iocp.obj \
 	event_iocp.obj bufferevent_async.obj
 EXTRA_OBJS=event_tagging.obj http.obj evdns.obj evrpc.obj
 
-ALL_OBJS=$(CORE_OBJS) $(WIN_OBJS) $(EXTRA_OBJS)
-STATIC_LIBS=libevent_core.lib libevent_extras.lib libevent.lib
+!IFDEF OPENSSL_DIR
+SSL_OBJS=bufferevent_openssl.obj
+SSL_LIBS=libevent_openssl.lib
+!ELSE
+SSL_OBJS=
+SSL_LIBS=
+!ENDIF
+
+ALL_OBJS=$(CORE_OBJS) $(WIN_OBJS) $(EXTRA_OBJS) $(SSL_OBJS)
+STATIC_LIBS=libevent_core.lib libevent_extras.lib libevent.lib $(SSL_LIBS)
 
 
 all: static_libs tests
@@ -38,12 +62,21 @@ libevent_extras.lib: $(EXTRA_OBJS)
 libevent.lib: $(CORE_OBJS) $(WIN_OBJS) $(EXTRA_OBJS)
 	lib $(LIBFLAGS) $(CORE_OBJS) $(EXTRA_OBJS) $(WIN_OBJS) /out:libevent.lib
 
+libevent_openssl.lib: $(SSL_OBJS)
+	lib $(LIBFLAGS) $(SSL_OBJS) /out:libevent_openssl.lib
+
 clean:
 	del $(ALL_OBJS)
 	del $(STATIC_LIBS)
 	cd test
 	$(MAKE) /F Makefile.nmake clean
+	cd ..
 
 tests:
 	cd test
+!IFDEF OPENSSL_DIR
+	$(MAKE) OPENSSL_DIR=$(OPENSSL_DIR) /F Makefile.nmake
+!ELSE
 	$(MAKE) /F Makefile.nmake
+!ENDIF
+	cd ..
diff --git a/test/Makefile.nmake b/test/Makefile.nmake
index 6f37db9b..f33ca530 100644
--- a/test/Makefile.nmake
+++ b/test/Makefile.nmake
@@ -1,5 +1,16 @@
+# WATCH OUT!  This makefile is a work in progress.             -*- makefile -*-
 
-CFLAGS=/I.. /I../WIN32-Code /I../include /I../compat /DHAVE_CONFIG_H /DTINYTEST_LOCAL
+!IFDEF OPENSSL_DIR
+SSL_CFLAGS=/I$(OPENSSL_DIR)\include /DEVENT__HAVE_OPENSSL
+SSL_OBJS=regress_ssl.obj
+SSL_LIBS=..\libevent_openssl.lib $(OPENSSL_DIR)\lib\libeay32.lib $(OPENSSL_DIR)\lib\ssleay32.lib
+!ELSE
+SSL_CFLAGS=
+SSL_OBJS=
+SSL_LIBS=
+!ENDIF
+
+CFLAGS=/I.. /I../WIN32-Code /I../include /I../compat /DHAVE_CONFIG_H /DTINYTEST_LOCAL $(SSL_CFLAGS)
 
 CFLAGS=$(CFLAGS) /Ox /W3 /wd4996 /nologo
 
@@ -9,7 +20,7 @@ REGRESS_OBJS=regress.obj regress_buffer.obj regress_http.obj regress_dns.obj \
 	regress_et.obj regress_bufferevent.obj \
 	regress_listener.obj regress_util.obj tinytest.obj \
 	regress_main.obj regress_minheap.obj regress_iocp.obj \
-	regress_thread.obj
+	regress_thread.obj $(SSL_OBJS)
 
 OTHER_OBJS=test-init.obj test-eof.obj test-weof.obj test-time.obj \
 	bench.obj bench_cascade.obj bench_http.obj bench_httpclient.obj \
@@ -28,7 +39,7 @@ LIBS=..\libevent.lib ws2_32.lib shell32.lib advapi32.lib
 all: $(PROGRAMS)
 
 regress.exe: $(REGRESS_OBJS)
-	$(CC) $(CFLAGS) $(LIBS) $(REGRESS_OBJS)
+	$(CC) $(CFLAGS) $(LIBS) $(SSL_LIBS) $(REGRESS_OBJS)
 
 test-init.exe: test-init.obj
 	$(CC) $(CFLAGS) $(LIBS) test-init.obj