1 files changed, 3 insertions, 0 deletions
diff --git a/apps/include/function.h b/apps/include/function.h
index 1911a64947..28eb3e5d1c 100644
--- a/apps/include/function.h
+++ b/apps/include/function.h
@@ -13,6 +13,8 @@
 # include <openssl/lhash.h>
 # include "opt.h"
 
+#define DEPRECATED_NO_ALTERNATIVE   "unknown"
+
 typedef enum FUNC_TYPE {
     FT_none, FT_general, FT_md, FT_cipher, FT_pkey,
     FT_md_alg, FT_cipher_alg
@@ -23,6 +25,7 @@ typedef struct function_st {
     const char *name;
     int (*func)(int argc, char *argv[]);
     const OPTIONS *help;
+    const char *deprecated_alternative;
 } FUNCTION;
 
 DEFINE_LHASH_OF(FUNCTION);