diff --git a/crypto/conf/conf.h b/crypto/conf/conf.h
index 176d64b57..4e14cd000 100644
--- a/crypto/conf/conf.h
+++ b/crypto/conf/conf.h
@@ -128,7 +128,7 @@ void CONF_free(LHASH *conf);
 int CONF_dump_fp(LHASH *conf, FILE *out);
 int CONF_dump_bio(LHASH *conf, BIO *out);
 
-void OPENSSL_config(char *config_name);
+void OPENSSL_config(const char *config_name);
 
 /* New conf code.  The semantics are different from the functions above.
    If that wasn't the case, the above functions would have been replaced */
diff --git a/crypto/conf/conf_mall.c b/crypto/conf/conf_mall.c
index 18dbf1161..e7b4bdb65 100644
--- a/crypto/conf/conf_mall.c
+++ b/crypto/conf/conf_mall.c
@@ -81,7 +81,7 @@ void OPENSSL_load_builtin_modules(void)
 
 static int openssl_configured = 0;
 
-void OPENSSL_config(char *config_name)
+void OPENSSL_config(const char *config_name)
 	{
 	int err_exit = 0;
 	char *file;