diff --git a/UPGRADING b/UPGRADING
index 33616627fcc..d1db6a5f9fd 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -212,6 +212,8 @@ PHP 7.1 UPGRADE NOTES
 - FILTER_FLAG_EMAIL_UNICODE can be used with filter_var() for email validation
   according to RFC 6531.
 - output_reset_rewrite_vars() no longer reset session URL rewrite vars.
+- the lasinsertid() in pdo_pgsql extension triggers an error, when no nextval()
+  were called in in the current session.
 
 
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