diff --git a/appl/kx/context.c b/appl/kx/context.c
index 021648afe..fee1b06ae 100644
--- a/appl/kx/context.c
+++ b/appl/kx/context.c
@@ -45,7 +45,7 @@ RCSID("$Id$");
  */
 
 void
-context_set (kx_context *kc, char *host, char *user, int port,
+context_set (kx_context *kc, const char *host, const char *user, int port,
 	     int debug_flag, int keepalive_flag, int tcp_flag)
 {
     kc->host		= host;