diff --git a/src/main/java/org/apache/xmlbeans/impl/inst2xsd/util/TypeSystemHolder.java b/src/main/java/org/apache/xmlbeans/impl/inst2xsd/util/TypeSystemHolder.java
index cc3b92060..531998993 100644
--- a/src/main/java/org/apache/xmlbeans/impl/inst2xsd/util/TypeSystemHolder.java
+++ b/src/main/java/org/apache/xmlbeans/impl/inst2xsd/util/TypeSystemHolder.java
@@ -193,7 +193,7 @@ protected void fillUpLocalElement(Element element, org.apache.xmlbeans.impl.xb.x
         }
         if (element.getMinOccurs()!=1)
         {
-            localSElement.setMinOccurs(new BigInteger("" + element.getMinOccurs()));
+            localSElement.setMinOccurs(BigInteger.valueOf(element.getMinOccurs()));
         }
 
         if (element.isNillable())
@@ -323,7 +323,7 @@ else if (type.getTopParticleForComplexOrMixedContent()==Type.PARTICLE_CHOICE_UNB
             {
                 explicitGroup = sComplexType.addNewChoice();
                 explicitGroup.setMaxOccurs("unbounded");
-                explicitGroup.setMinOccurs(new BigInteger("0"));
+                explicitGroup.setMinOccurs(BigInteger.ZERO);
             }
             else { throw new IllegalStateException("Unknown particle type in complex and mixed content"); }