diff --git a/db/ddlutils/postgresql/functions/trunc.sql b/db/ddlutils/postgresql/functions/trunc.sql
index d344d18bdb..20a2258488 100644
--- a/db/ddlutils/postgresql/functions/trunc.sql
+++ b/db/ddlutils/postgresql/functions/trunc.sql
@@ -27,7 +27,7 @@ END;
 $$ LANGUAGE plpgsql;
 
 CREATE OR REPLACE FUNCTION trunc(datetime TIMESTAMP WITH TIME ZONE, format varchar)
-RETURNS DATE AS $$
+RETURNS TIMESTAMP WITH TIME ZONE AS $$
 BEGIN
 	IF format = 'Q' THEN
 		RETURN CAST(DATE_Trunc('quarter',datetime) as DATE);
diff --git a/migration/330-331b/postgresql/030_BF_1824260.sql b/migration/330-331b/postgresql/030_BF_1824260.sql
index 033bd1a1d8..82e5745709 100644
--- a/migration/330-331b/postgresql/030_BF_1824260.sql
+++ b/migration/330-331b/postgresql/030_BF_1824260.sql
@@ -2,7 +2,7 @@
 -- http://sourceforge.net/tracker/?func=detail&atid=879332&aid=1824260&group_id=176962
 --
 CREATE OR REPLACE FUNCTION trunc(datetime TIMESTAMP WITH TIME ZONE)
-RETURNS DATE AS $$
+RETURNS TIMESTAMP WITH TIME ZONE AS $$
 BEGIN
 	RETURN CAST(datetime AS DATE);
 END;