diff --git a/src/main/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDto.java b/src/main/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDto.java
index 2b65e1e..f6a3310 100644
--- a/src/main/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDto.java
+++ b/src/main/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDto.java
@@ -14,7 +14,7 @@
 import java.util.Optional;
 
 @JsonSubTypes({@Type(EntityFormControlDataDto.class), @Type(LiteralFormControlDataDto.class), @Type(IriFormControlDataDto.class)})
-@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME)
 public abstract class PrimitiveFormControlDataDto implements Comparable<PrimitiveFormControlDataDto> {
 
     public static final int BEFORE = -1;
diff --git a/src/test/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDtoTest.java b/src/test/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDtoTest.java
new file mode 100644
index 0000000..9da3844
--- /dev/null
+++ b/src/test/java/edu/stanford/protege/webprotege/forms/data/PrimitiveFormControlDataDtoTest.java
@@ -0,0 +1,87 @@
+package edu.stanford.protege.webprotege.forms.data;
+
+import com.google.common.collect.ImmutableMap;
+import edu.stanford.protege.webprotege.entity.*;
+import edu.stanford.protege.webprotege.jackson.WebProtegeJacksonApplication;
+import org.junit.jupiter.api.Test;
+import org.semanticweb.owlapi.model.IRI;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.json.*;
+import org.springframework.boot.test.json.JacksonTester;
+import org.springframework.context.annotation.Import;
+import uk.ac.manchester.cs.owl.owlapi.*;
+
+import java.io.*;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Matthew Horridge
+ * Stanford Center for Biomedical Informatics Research
+ * 2024-07-03
+ */
+@JsonTest
+@AutoConfigureJsonTesters
+@Import(WebProtegeJacksonApplication.class)
+public class PrimitiveFormControlDataDtoTest {
+
+    @Autowired
+    private JacksonTester<PrimitiveFormControlDataDto> tester;
+
+    @Test
+    public void shouldSerializeEntityData() throws IOException {
+        var data = PrimitiveFormControlDataDto.get(OWLClassData.get(new OWLClassImpl(IRI.create("http://example.org/A")), ImmutableMap.of()));
+        var written = tester.write(data);
+        System.out.println(written.getJson());
+        assertThat(written).hasJsonPathStringValue("['@type']", "EntityFormControlDataDto");
+        assertThat(written).hasJsonPathValue("entity");
+    }
+
+    @Test
+    void shouldDeserializeEntityData() throws IOException {
+        var expected = PrimitiveFormControlDataDto.get(OWLClassData.get(new OWLClassImpl(IRI.create("http://example.org/A")), ImmutableMap.of()));
+        var json = """
+                {"@type":"EntityFormControlDataDto","entity":{"@type":"ClassData","iri":"http://example.org/A"}}
+                """;
+        var read = tester.read(new StringReader(json));
+        assertThat(read.getObject()).isEqualTo(expected);
+    }
+
+    @Test
+    public void shouldSerializeIriData() throws IOException {
+        var data = PrimitiveFormControlDataDto.get(IRIData.get(IRI.create("http://example.org/A"), ImmutableMap.of()));
+        var written = tester.write(data);
+        System.out.println(written.getJson());
+        assertThat(written).hasJsonPathStringValue("['@type']", "IriFormControlDataDto");
+        assertThat(written).hasJsonPathValue("iri");
+    }
+
+    @Test
+    void shouldDeserializeIriData() throws IOException {
+        var expected = PrimitiveFormControlDataDto.get(IRIData.get(IRI.create("http://example.org/A"), ImmutableMap.of()));
+        var json = """
+                {"@type":"IriFormControlDataDto","iri":{"@type":"IRIData","iri":"http://example.org/A"}}
+                """;
+        var read = tester.read(new StringReader(json));
+        assertThat(read.getObject()).isEqualTo(expected);
+    }
+
+    @Test
+    public void shouldSerializeLiteralData() throws IOException {
+        var data = PrimitiveFormControlDataDto.get(OWLLiteralData.get(new OWLLiteralImpl("abc", "en", null)));
+        var written = tester.write(data);
+        System.out.println(written.getJson());
+        assertThat(written).hasJsonPathStringValue("['@type']", "LiteralFormControlDataDto");
+        assertThat(written).hasJsonPathValue("literal");
+    }
+
+    @Test
+    void shouldDeserializeLiteralData() throws IOException {
+        var expected = PrimitiveFormControlDataDto.get(OWLLiteralData.get(new OWLLiteralImpl("abc", "en", null)));
+        var json = """
+                {"@type":"LiteralFormControlDataDto","literal":{"@type":"LiteralData","value":"abc","lang":"en"}}
+                """;
+        var read = tester.read(new StringReader(json));
+        assertThat(read.getObject()).isEqualTo(expected);
+    }
+}