diff --git a/ssl/ssl-lib.com b/ssl/ssl-lib.com
index be8d889a9..a21e5554f 100644
--- a/ssl/ssl-lib.com
+++ b/ssl/ssl-lib.com
@@ -898,6 +898,7 @@ $!
 $! Set Up Initial CC Definitions, Possibly With User Ones
 $!
 $ CCDEFS = "VMS=1,TCPIP_TYPE_''P5'"
+$ IF F$TRNLNM("OPENSSL_NO_KRB5") .OR. TRUE THEN CCDEFS = CCDEFS + ",NO_KRB5"
 $ IF F$TRNLNM("OPENSSL_NO_ASM") THEN CCDEFS = CCDEFS + ",NO_ASM"
 $ IF F$TRNLNM("OPENSSL_NO_RSA") THEN CCDEFS = CCDEFS + ",NO_RSA"
 $ IF F$TRNLNM("OPENSSL_NO_DSA") THEN CCDEFS = CCDEFS + ",NO_DSA"