diff --git a/crypto/opensslv.h b/crypto/opensslv.h
index bd801c4838..5f7e82e785 100644
--- a/crypto/opensslv.h
+++ b/crypto/opensslv.h
@@ -9,6 +9,7 @@
  * 0.9.3	0x00903100
  * 0.9.3a	0x00903101
  * 1.2.3z	0x1020311a
+ * (Prior to 0.9.3-dev a different scheme was used: 0.9.2b is 0x0922.)
  */
 #define OPENSSL_VERSION_NUMBER	0x00903000L
 #define OPENSSL_VERSION_TEXT	"OpenSSL 0.9.3-dev 19 May 1999"