1 files changed, 9 insertions, 9 deletions

diff --git a/src/lib/libcrypto/stack/stack.h b/src/lib/libcrypto/stack/stack.h
index a615d9b4c9..8b436ca4b9 100644
--- a/src/lib/libcrypto/stack/stack.h
+++ b/src/lib/libcrypto/stack/stack.h
@@ -70,23 +70,21 @@ typedef struct stack_st
         int sorted;
 
         int num_alloc;
-        int (*comp)();
+        int (*comp)(const char * const *, const char * const *);
         } STACK;
 
-
-#define sk_new_null()   sk_new(NULL)
-
 #define M_sk_num(sk)            ((sk) ? (sk)->num:-1)
 #define M_sk_value(sk,n)        ((sk) ? (sk)->data[n] : NULL)
 
-int sk_num(STACK *);
-char *sk_value(STACK *, int);
+int sk_num(const STACK *);
+char *sk_value(const STACK *, int);
 
 char *sk_set(STACK *, int, char *);
 
-STACK *sk_new(int (*cmp)());
+STACK *sk_new(int (*cmp)(const char * const *, const char * const *));
+STACK *sk_new_null(void);
 void sk_free(STACK *);
-void sk_pop_free(STACK *st, void (*func)());
+void sk_pop_free(STACK *st, void (*func)(void *));
 int sk_insert(STACK *sk,char *data,int where);
 char *sk_delete(STACK *st,int loc);
 char *sk_delete_ptr(STACK *st, char *p);
@@ -96,7 +94,9 @@ int sk_unshift(STACK *st,char *data);
 char *sk_shift(STACK *st);
 char *sk_pop(STACK *st);
 void sk_zero(STACK *st);
-int (*sk_set_cmp_func(STACK *sk, int (*c)()))();
+int (*sk_set_cmp_func(STACK *sk, int (*c)(const char * const *,
+                        const char * const *)))
+                        (const char * const *, const char * const *);
 STACK *sk_dup(STACK *st);
 void sk_sort(STACK *st);