X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/3857519629ca8fbcf3466c3fc761a5bb6ed32d53..fa1c8faf169384bebaa8d172f491574c45ae2aa4:/src/src/spf.h

diff --git a/src/src/spf.h b/src/src/spf.h
index 76c7522bd..afee742ed 100644
--- a/src/src/spf.h
+++ b/src/src/spf.h
@@ -29,7 +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