diff --git a/src/interfaces/libpq/fe-protocol3.c b/src/interfaces/libpq/fe-protocol3.c
index db6fd71ad4d..bedd4b5585f 100644
--- a/src/interfaces/libpq/fe-protocol3.c
+++ b/src/interfaces/libpq/fe-protocol3.c
@@ -42,7 +42,8 @@
 	 (id) == PqMsg_FunctionCallResponse || \
 	 (id) == PqMsg_NoticeResponse || \
 	 (id) == PqMsg_NotificationResponse || \
-	 (id) == PqMsg_RowDescription)
+	 (id) == PqMsg_RowDescription || \
+	 (id) == PqMsg_ParameterDescription)
 
 
 static void handleSyncLoss(PGconn *conn, char id, int msgLength);