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-rw-r--r--src/include/libpq/scram.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/libpq/scram.h b/src/include/libpq/scram.h
index 8eeb8807e91..d7f4c094c9d 100644
--- a/src/include/libpq/scram.h
+++ b/src/include/libpq/scram.h
@@ -24,7 +24,7 @@
/* Routines dedicated to authentication */
extern void pg_be_scram_get_mechanisms(Port *port, StringInfo buf);
extern void *pg_be_scram_init(Port *port, const char *selected_mech, const char *shadow_pass);
-extern int pg_be_scram_exchange(void *opaq, char *input, int inputlen,
+extern int pg_be_scram_exchange(void *opaq, const char *input, int inputlen,
char **output, int *outputlen, char **logdetail);
/* Routines to handle and check SCRAM-SHA-256 verifier */