diff --git a/rewrite-xml/src/main/java/org/openrewrite/xml/internal/XmlParserVisitor.java b/rewrite-xml/src/main/java/org/openrewrite/xml/internal/XmlParserVisitor.java
index f12be7615e7..7cf518756c9 100755
--- a/rewrite-xml/src/main/java/org/openrewrite/xml/internal/XmlParserVisitor.java
+++ b/rewrite-xml/src/main/java/org/openrewrite/xml/internal/XmlParserVisitor.java
@@ -335,7 +335,7 @@ public Xml.DocTypeDecl visitDoctypedecl(XMLParser.DoctypedeclContext ctx) {
                     Markers.EMPTY,
                     name,
                     externalId,
-                    internalSubset,
+                    internalSubset == null ? Collections.emptyList() : internalSubset,
                     externalSubsets,
                     beforeTagDelimiterPrefix);
         });
diff --git a/rewrite-xml/src/main/java/org/openrewrite/xml/tree/Xml.java b/rewrite-xml/src/main/java/org/openrewrite/xml/tree/Xml.java
index 63f45d29e7f..901ff50e765 100755
--- a/rewrite-xml/src/main/java/org/openrewrite/xml/tree/Xml.java
+++ b/rewrite-xml/src/main/java/org/openrewrite/xml/tree/Xml.java
@@ -618,6 +618,7 @@ public String getPrefix() {
 
         Markers markers;
         Ident name;
+        @Nullable
         Ident externalId;
         List<Ident> internalSubset;
 
diff --git a/rewrite-xml/src/test/java/org/openrewrite/xml/XmlParserTest.java b/rewrite-xml/src/test/java/org/openrewrite/xml/XmlParserTest.java
index 6290e883677..1c2b030de79 100755
--- a/rewrite-xml/src/test/java/org/openrewrite/xml/XmlParserTest.java
+++ b/rewrite-xml/src/test/java/org/openrewrite/xml/XmlParserTest.java
@@ -16,14 +16,35 @@
 package org.openrewrite.xml;
 
 import org.junit.jupiter.api.Test;
+import org.openrewrite.ExecutionContext;
 import org.openrewrite.Issue;
+import org.openrewrite.test.RecipeSpec;
 import org.openrewrite.test.RewriteTest;
+import org.openrewrite.xml.tree.Xml;
 
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.openrewrite.test.RewriteTest.toRecipe;
 import static org.openrewrite.xml.Assertions.xml;
 
 @SuppressWarnings({"CheckDtdRefs", "CheckTagEmptyBody"})
 class XmlParserTest implements RewriteTest {
 
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec.recipe(toRecipe(
+          () -> new XmlVisitor<>() {
+              @Override
+              public Xml visitDocTypeDecl(Xml.DocTypeDecl docTypeDecl, ExecutionContext executionContext) {
+                  assertNotNull(docTypeDecl.getPrefixUnsafe(), "prefix should not be null");
+                  assertNotNull(docTypeDecl.getName(), "name should not be null");
+                  assertNotNull(docTypeDecl.getInternalSubset(), "internalSubset should not be null");
+                  assertNotNull(docTypeDecl.getBeforeTagDelimiterPrefix(), "beforeTagDelimiterPrefix should not be null");
+                  return super.visitDocTypeDecl(docTypeDecl, executionContext);
+              }
+          }
+        ));
+    }
+
     @Issue("https://github.com/openrewrite/rewrite/issues/2189")
     @Test
     void specialCharacters() {