diff --git a/server/src/main/java/org/elasticsearch/index/mapper/DocumentParser.java b/server/src/main/java/org/elasticsearch/index/mapper/DocumentParser.java
index e1c9d2eee5690..0ff754d953934 100644
--- a/server/src/main/java/org/elasticsearch/index/mapper/DocumentParser.java
+++ b/server/src/main/java/org/elasticsearch/index/mapper/DocumentParser.java
@@ -851,6 +851,7 @@ private static void parseNonDynamicArray(
                 elements = Integer.MAX_VALUE;
                 parseArray(context, lastFieldName);
             } else if (token == XContentParser.Token.VALUE_NULL) {
+                elements++;
                 parseNullValue(context, lastFieldName);
             } else if (token == null) {
                 throwEOFOnParseArray(arrayFieldName, context);
diff --git a/server/src/test/java/org/elasticsearch/index/mapper/IgnoredSourceFieldMapperTests.java b/server/src/test/java/org/elasticsearch/index/mapper/IgnoredSourceFieldMapperTests.java
index 5e93243d9186c..205ff08c397b2 100644
--- a/server/src/test/java/org/elasticsearch/index/mapper/IgnoredSourceFieldMapperTests.java
+++ b/server/src/test/java/org/elasticsearch/index/mapper/IgnoredSourceFieldMapperTests.java
@@ -542,6 +542,14 @@ public void testIndexStoredArraySourceSingleLeafElement() throws IOException {
         assertNull(doc.rootDoc().getField("_ignored_source"));
     }
 
+    public void testIndexStoredArraySourceSingleLeafElementAndNull() throws IOException {
+        DocumentMapper documentMapper = createMapperServiceWithStoredArraySource(syntheticSourceMapping(b -> {
+            b.startObject("value").field("type", "keyword").endObject();
+        })).documentMapper();
+        var syntheticSource = syntheticSource(documentMapper, b -> b.array("value", new String[] { "foo", null }));
+        assertEquals("{\"value\":[\"foo\",null]}", syntheticSource);
+    }
+
     public void testIndexStoredArraySourceSingleObjectElement() throws IOException {
         DocumentMapper documentMapper = createMapperServiceWithStoredArraySource(syntheticSourceMapping(b -> {
             b.startObject("path").startObject("properties");