diff --git a/jOOQ/src/main/java/org/jooq/impl/ConstantSortField.java b/jOOQ/src/main/java/org/jooq/impl/ConstantSortField.java
index 2dea0a4581..c36d03e0da 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ConstantSortField.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ConstantSortField.java
@@ -60,11 +60,16 @@ final class ConstantSortField<T> extends CustomField<T> {
     @Override
     public void accept(Context<?> ctx) {
         switch (ctx.family()) {
+            // [#6574] [#7183] Some databases do not allow for ORDER BY null clauses
 
 
 
 
 
+            case POSTGRES:
+                ctx.sql('(').visit(K_SELECT).sql(" 1)");
+                break;
+
             default:
                 ctx.visit(DSL.NULL().sortDefault());
                 break;