diff --git a/src/main/java/com/github/sabomichal/immutablexjc/PluginImpl.java b/src/main/java/com/github/sabomichal/immutablexjc/PluginImpl.java
index 3e030a4..a6b2b79 100644
--- a/src/main/java/com/github/sabomichal/immutablexjc/PluginImpl.java
+++ b/src/main/java/com/github/sabomichal/immutablexjc/PluginImpl.java
@@ -341,7 +341,7 @@ private JMethod addBuildMethod(JDefinedClass clazz, JDefinedClass builderClass,
         }
         for (JFieldVar field : declaredFields) {
             if (mustAssign(field)) {
-                if (isRequired(field)) {
+                if (isRequired(field) && !field.type().isPrimitive()) {
                     JBlock block = method.body();
                     JConditional conditional = block._if(field.eq(JExpr._null()));
                     conditional._then()._throw(JExpr._new(builderClass.owner().ref(NullPointerException.class))
@@ -939,6 +939,10 @@ private boolean isMap(JClass clazz) {
     }
 
     private boolean isRequired(JFieldVar field) {
+        if (field.type().isPrimitive()) {
+            return true;
+        }
+
         if (getAnnotation(field.annotations(), XmlValue.class.getCanonicalName()).isPresent()) {
             return true;
         }
diff --git a/src/test/java/com/github/sabomichal/immutablexjc/test/TestMiscOptions.java b/src/test/java/com/github/sabomichal/immutablexjc/test/TestMiscOptions.java
index aafe28c..6d6687a 100644
--- a/src/test/java/com/github/sabomichal/immutablexjc/test/TestMiscOptions.java
+++ b/src/test/java/com/github/sabomichal/immutablexjc/test/TestMiscOptions.java
@@ -4,6 +4,8 @@
 import com.github.sabomichal.immutablexjc.test.misc.Model;
 import com.github.sabomichal.immutablexjc.test.misc.NameExpression;
 import com.github.sabomichal.immutablexjc.test.misc.Parameters;
+import com.github.sabomichal.immutablexjc.test.optionalgetter.DecimalExtensionType;
+import com.github.sabomichal.immutablexjc.test.optionalgetter.NoOptionalForPrimitive;
 import jakarta.xml.bind.JAXBContext;
 import jakarta.xml.bind.Marshaller;
 import org.junit.jupiter.api.Test;
@@ -103,9 +105,13 @@ public void testOptionalGetter() {
                        .getDocumentation()
                        .isPresent());
 
-        com.github.sabomichal.immutablexjc.test.optionalgetter.DecimalExtensionType type = new com.github.sabomichal.immutablexjc.test.optionalgetter.DecimalExtensionType(BigDecimal.valueOf(1), "s");
+        DecimalExtensionType type = new DecimalExtensionType(BigDecimal.valueOf(1), "s");
         assertNotNull(type.getValue());
         assertEquals(BigDecimal.class, type.getValue().getClass());
         assertTrue(type.getUnit().isPresent());
+
+        NoOptionalForPrimitive primitive = new NoOptionalForPrimitive(1);
+        assertNotNull(primitive.getIndex());
+        assertEquals(1, primitive.getIndex());
     }
 }
diff --git a/src/test/xsd/basic.xsd b/src/test/xsd/basic.xsd
index cd76ce4..e9f620b 100644
--- a/src/test/xsd/basic.xsd
+++ b/src/test/xsd/basic.xsd
@@ -51,4 +51,9 @@
             <xs:fractionDigits value="3"/>
         </xs:restriction>
     </xs:simpleType>
+    <xs:complexType name="NoOptionalForPrimitive">
+        <xs:sequence>
+            <xs:element name="index" type="xs:int"/>
+        </xs:sequence>
+    </xs:complexType>
 </xs:schema>
\ No newline at end of file