1 files changed, 1 insertions, 1 deletions
diff --git a/apps/s_cb.c b/apps/s_cb.c
index ba0b548ea1..c18ecc3a18 100644
--- a/apps/s_cb.c
+++ b/apps/s_cb.c
@@ -184,7 +184,7 @@ char *key_file;
 long MS_CALLBACK bio_dump_cb(bio,cmd,argp,argi,argl,ret)
 BIO *bio;
 int cmd;
-char *argp;
+const char *argp;
 int argi;
 long argl;
 long ret;