diff --git a/appl/su/su.c b/appl/su/su.c
index ada1f115f..fd38a1c2d 100644
--- a/appl/su/su.c
+++ b/appl/su/su.c
@@ -50,7 +50,7 @@ RCSID("$Id$");
 
 #include <pwd.h>
 
-#ifdef HAVE_OPENSSL_DES_H
+#ifdef HAVE_OPENSSL
 #include <openssl/des.h>
 #else
 #include <des.h>