diff --git a/crypto/conf/conf_lib.c b/crypto/conf/conf_lib.c
index a84b643fc2..f1977148b4 100644
--- a/crypto/conf/conf_lib.c
+++ b/crypto/conf/conf_lib.c
@@ -387,12 +387,14 @@ OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void)
 }
 
 
+#ifndef OPENSSL_NO_STDIO
 void OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
                                       const char *config_file)
 {
     free(settings->config_name);
     settings->config_name = config_file == NULL ? NULL : strdup(config_file);
 }
+#endif
 
 void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings)
 {
diff --git a/include/openssl/crypto.h b/include/openssl/crypto.h
index a881fada73..bcc5aee94c 100644
--- a/include/openssl/crypto.h
+++ b/include/openssl/crypto.h
@@ -565,8 +565,10 @@ void OPENSSL_thread_stop(void);
 
 /* Low-level control of initialization */
 OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void);
+#ifndef OPENSSL_NO_STDIO
 void OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
                                       const char *config_file);
+#endif
 void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings);
 
 /* BEGIN ERROR CODES */