diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java
index bd510446e..f80a8f5ad 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java
@@ -364,8 +364,8 @@ public class Element extends Base {
           if (p.getName().equals(e.getName()))
             t = c;
         }
-        if (t > i)
-          i = t;
+        if (t >= i)
+          i = t+1;
         if (p.getName().equals(name) || p.getName().equals(name+"[x]")) {
           Element ne = new Element(name, p);
           children.add(i, ne);