diff --git a/conn.go b/conn.go
index <HASH>..<HASH> 100644
--- a/conn.go
+++ b/conn.go
@@ -158,7 +158,7 @@ func (cn *conn) simpleQuery(q string) (res driver.Result, err error) {
 			return
 		case 'E':
 			err = parseError(r)
-		case 'T', 'N':
+		case 'T', 'N', 'S':
 			// ignore
 		default:
 			errorf("unknown response for simple query: %q", t)
Ignore ParameterStatus responses to simpleQuery.

This allows running, e.g., "SET TIME ZONE 'US/Eastern'".