diff --git a/src/config/pool_config_variables.c b/src/config/pool_config_variables.c
index a138e38..b4fd4aa 100644
--- a/src/config/pool_config_variables.c
+++ b/src/config/pool_config_variables.c
@@ -4606,8 +4606,8 @@ FailOverOnBackendErrorAssignMessage(ConfigContext scontext, bool newval, int ele
 	if (scontext != CFGCXT_BOOT)
 		ereport(WARNING,
 				(errmsg("fail_over_on_backend_error is changed to failover_on_backend_error"),
-				 errdetail("setting failover_on_backend_error has no effect"),
-				 errhint("use failover_on_backend_error instead")));
+				 errdetail("if fail_over_on_backend_error is specified, the value will be set to failover_on_backend_error")));
+	g_pool_config.failover_on_backend_error = newval;
 	return true;
 }
 /*
@@ -5404,8 +5404,10 @@ ShowOption(struct config_generic *record, int index, int elevel)
 
 				if (conf->show_hook)
 					val = (*conf->show_hook) ();
-				else
+				else if (conf->variable)
 					val = *conf->variable ? "on" : "off";
+				else
+					val = "";
 			}
 			break;