diff --git a/Makefile.nmake b/Makefile.nmake
index 76a423b4..39efbc91 100644
--- a/Makefile.nmake
+++ b/Makefile.nmake
@@ -3,7 +3,14 @@
 # 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 you want OpenSSL support, uncomment and change to where your OpenSSL is
+# 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