X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/9f6b3bf5187562bac4c96e3ed6a17740d01489fa..f2738aab2d72569b6d47b788099f6ebab701b2b2:/src/src/spf.h

diff --git a/src/src/spf.h b/src/src/spf.h
index f32d06906..afee742ed 100644
--- a/src/src/spf.h
+++ b/src/src/spf.h
@@ -6,6 +6,7 @@
    Copyright (c) The Exim Maintainers 2016 - 2022
    Copyright (c) Tom Kistner <tom@duncanthrax.net> 2004
    License: GPL
+   SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifdef SUPPORT_SPF
@@ -28,7 +29,7 @@ typedef struct spf_result_id {
 gstring * spf_lib_version_report(gstring *);
 BOOL spf_init(void);
 BOOL spf_conn_init(uschar *, uschar *);
-int  spf_process(const uschar **, uschar *, int);
+int  spf_process(const uschar **, const uschar *, int);
 void spf_response_debug(SPF_response_t *);
 
 #define SPF_PROCESS_NORMAL  0