diff --git a/store/postgres/sql_typecasters.go b/store/postgres/sql_typecasters.go
index 2dcdf87a5..32bd675ef 100644
--- a/store/postgres/sql_typecasters.go
+++ b/store/postgres/sql_typecasters.go
@@ -27,7 +27,7 @@ func fieldToColumnTypeCaster(field rdbms.ModuleFieldTypeDetector, ident string)
 		fc := fmt.Sprintf(fcp, ident)
 		return fmt.Sprintf(tcp, fc), fcp, tcp, nil
 	case field.IsDateTime():
-		tcp := "to_timestamp(%s,'YYYY-MM-DD\"T\"HH24:MI:SS\"Z\"') "
+		tcp := "to_timestamp(NULLIF(%s, ''),'YYYY-MM-DD\"T\"HH24:MI:SS\"Z\"') "
 		fc := fmt.Sprintf(fcp, ident)
 		return fmt.Sprintf(tcp, fc), fcp, tcp, nil
 	case field.IsRef():