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-rw-r--r--psycopg/connection_int.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/psycopg/connection_int.c b/psycopg/connection_int.c
index bf72df3..2cc7818 100644
--- a/psycopg/connection_int.c
+++ b/psycopg/connection_int.c
@@ -296,7 +296,7 @@ conn_switch_isolation_level(connectionObject *self, int level)
/* conn_set_client_encoding - switch client encoding on connection */
int
-conn_set_client_encoding(connectionObject *self, char *enc)
+conn_set_client_encoding(connectionObject *self, const char *enc)
{
PGresult *pgres = NULL;
char *error = NULL;