diff --git a/jOOQ-meta/src/main/java/org/jooq/util/postgres/PostgresDatabase.java b/jOOQ-meta/src/main/java/org/jooq/util/postgres/PostgresDatabase.java
index 1ef4e12275..c6ee435bff 100644
--- a/jOOQ-meta/src/main/java/org/jooq/util/postgres/PostgresDatabase.java
+++ b/jOOQ-meta/src/main/java/org/jooq/util/postgres/PostgresDatabase.java
@@ -186,6 +186,9 @@ public class PostgresDatabase extends AbstractDatabase {
                     {
                         for (int ordinal = 0; ordinal < columns.length; ordinal++) {
                             String column = columns[ordinal];
+
+                            // [#6307] Some background info on this bitwise operation here:
+                            // https://stackoverflow.com/a/18128104/521799
                             SortOrder order = (options[ordinal] & 1) == 1 ? SortOrder.DESC : SortOrder.ASC;
 
                             indexColumns.add(new DefaultIndexColumnDefinition(