- (djm) Sync with V_3_7 branch:
   - (djm) Fix SSH1 challenge kludge
   - (djm) Bug #671: Fix builds on OpenBSD
   - (djm) Bug #676: Fix PAM stack corruption
   - (djm) Fix bad free() in PAM code
   - (djm) Don't call pam_end before pam_init
   - (djm) Enable build with old OpenSSL again
   - (djm) Trim deprecated options from INSTALL. Mention UsePAM
   - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
diff --git a/cipher-3des1.c b/cipher-3des1.c
index f9a3523..6f9f5dd 100644
--- a/cipher-3des1.c
+++ b/cipher-3des1.c
@@ -29,6 +29,10 @@
 #include "xmalloc.h"
 #include "log.h"
 
+#if OPENSSL_VERSION_NUMBER < 0x00906000L
+#define SSH_OLD_EVP
+#endif
+
 /*
  * This is used by SSH1:
  *