1 files changed, 6 insertions, 0 deletions
diff --git a/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/GuardExpression.java b/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/GuardExpression.java
index da7cfcdcaee..38a05c3056c 100644
--- a/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/GuardExpression.java
+++ b/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/GuardExpression.java
@@ -4,6 +4,7 @@ package com.yahoo.vespa.indexinglanguage.expressions;
 import com.yahoo.document.DataType;
 import com.yahoo.document.DocumentType;
 import com.yahoo.document.Field;
+import com.yahoo.vespa.indexinglanguage.ExpressionConverter;
 import com.yahoo.vespa.indexinglanguage.ExpressionVisitor;
 import com.yahoo.vespa.indexinglanguage.UpdateAdapter;
 import com.yahoo.vespa.objects.ObjectOperation;
@@ -28,6 +29,11 @@ public final class GuardExpression extends CompositeExpression {
     }
 
     @Override
+    public GuardExpression convertChildren(ExpressionConverter converter) {
+        return new GuardExpression(converter.convert(exp));
+    }
+
+    @Override
     public void setStatementOutput(DocumentType documentType, Field field) {
         exp.setStatementOutput(documentType, field);
     }