diff --git a/cayenne/src/main/java/org/apache/cayenne/access/translator/select/OrderingStage.java b/cayenne/src/main/java/org/apache/cayenne/access/translator/select/OrderingStage.java
index 9f7a9a5941..ea747a3c01 100644
--- a/cayenne/src/main/java/org/apache/cayenne/access/translator/select/OrderingStage.java
+++ b/cayenne/src/main/java/org/apache/cayenne/access/translator/select/OrderingStage.java
@@ -21,6 +21,7 @@
 
 import org.apache.cayenne.access.sqlbuilder.NodeBuilder;
 import org.apache.cayenne.access.sqlbuilder.OrderingNodeBuilder;
+import org.apache.cayenne.access.sqlbuilder.StringBuilderAppendable;
 import org.apache.cayenne.access.sqlbuilder.sqltree.Node;
 import org.apache.cayenne.exp.Expression;
 import org.apache.cayenne.exp.parser.ASTAggregateFunctionCall;
@@ -57,10 +58,11 @@ private void processOrdering(QualifierTranslator qualifierTranslator, Translator
         // If query is DISTINCT then we need to add all ORDER BY clauses as result columns
         if(!context.isDistinctSuppression()) {
             // Duplicate column check
-            String nodeStr = translatedNode.toString();
+            String orderStr = translatedNode.append(new StringBuilderAppendable()).append(' ').toString();
             boolean isNotPresent = context.getResultNodeList().stream()
-                        .map( result -> result.getNode().toString() )
-                        .noneMatch( node -> node.equals( nodeStr ) );
+                        .map( result -> result.getNode().append(new StringBuilderAppendable()).append(' ') )
+                        // the column may have an alias so just check that the orderStr part matches
+                        .noneMatch( column -> column.toString().startsWith( orderStr ) );
 
             if ( isNotPresent ) {
                 // deepCopy as some DB expect exactly the same expression in select and in ordering