diff --git a/src/test/java/org/springframework/data/jpa/domain/sample/SampleWithPrimitiveId.java b/src/test/java/org/springframework/data/jpa/domain/sample/SampleWithPrimitiveId.java
new file mode 100644
index 000000000..b7f7b5aa8
--- /dev/null
+++ b/src/test/java/org/springframework/data/jpa/domain/sample/SampleWithPrimitiveId.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.jpa.domain.sample;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+/**
+ * @author Oliver Gierke
+ */
+@Entity
+public class SampleWithPrimitiveId {
+
+	@Id long id;
+
+	/**
+	 * @param id the id to set
+	 */
+	public void setId(long id) {
+		this.id = id;
+	}
+}
diff --git a/src/test/java/org/springframework/data/jpa/repository/support/EclipseLinkJpaMetamodelEntityInformationIntegrationTests.java b/src/test/java/org/springframework/data/jpa/repository/support/EclipseLinkJpaMetamodelEntityInformationIntegrationTests.java
index 04e7df3a7..3c6d27ad5 100644
--- a/src/test/java/org/springframework/data/jpa/repository/support/EclipseLinkJpaMetamodelEntityInformationIntegrationTests.java
+++ b/src/test/java/org/springframework/data/jpa/repository/support/EclipseLinkJpaMetamodelEntityInformationIntegrationTests.java
@@ -49,6 +49,13 @@ public class EclipseLinkJpaMetamodelEntityInformationIntegrationTests extends
 	@Ignore
 	public void findsIdClassOnMappedSuperclass() {}
 
+	/**
+	 * Ignored due to https://bugs.eclipse.org/bugs/show_bug.cgi?id=415027
+	 */
+	@Override
+	@Ignore
+	public void detectsNewStateForEntityWithPrimitiveId() {}
+
 	@Override
 	protected String getMetadadataPersitenceUnitName() {
 		return "metadata_el";
diff --git a/src/test/java/org/springframework/data/jpa/repository/support/JpaMetamodelEntityInformationIntegrationTests.java b/src/test/java/org/springframework/data/jpa/repository/support/JpaMetamodelEntityInformationIntegrationTests.java
index ed9bc501a..3eb89536c 100644
--- a/src/test/java/org/springframework/data/jpa/repository/support/JpaMetamodelEntityInformationIntegrationTests.java
+++ b/src/test/java/org/springframework/data/jpa/repository/support/JpaMetamodelEntityInformationIntegrationTests.java
@@ -38,6 +38,7 @@ import org.junit.runner.RunWith;
 import org.springframework.data.jpa.domain.AbstractPersistable;
 import org.springframework.data.jpa.domain.sample.SampleWithIdClass;
 import org.springframework.data.jpa.domain.sample.SampleWithIdClassPK;
+import org.springframework.data.jpa.domain.sample.SampleWithPrimitiveId;
 import org.springframework.data.jpa.domain.sample.User;
 import org.springframework.data.jpa.domain.sample.VersionedUser;
 import org.springframework.data.repository.core.EntityInformation;
@@ -138,6 +139,22 @@ public class JpaMetamodelEntityInformationIntegrationTests {
 		assertThat(information.getIdType(), is((Object) BaseIdClass.class));
 	}
 
+	/**
+	 * @see DATACMNS-357
+	 */
+	@Test
+	public void detectsNewStateForEntityWithPrimitiveId() {
+
+		EntityInformation<SampleWithPrimitiveId, Long> information = new JpaMetamodelEntityInformation<SampleWithPrimitiveId, Long>(
+				SampleWithPrimitiveId.class, em.getMetamodel());
+
+		SampleWithPrimitiveId sample = new SampleWithPrimitiveId();
+		assertThat(information.isNew(sample), is(true));
+
+		sample.setId(5L);
+		assertThat(information.isNew(sample), is(false));
+	}
+
 	protected String getMetadadataPersitenceUnitName() {
 		return "metadata";
 	}
diff --git a/src/test/resources/META-INF/persistence.xml b/src/test/resources/META-INF/persistence.xml
index 397970da4..b91202a06 100644
--- a/src/test/resources/META-INF/persistence.xml
+++ b/src/test/resources/META-INF/persistence.xml
@@ -14,6 +14,7 @@
 		<class>org.springframework.data.jpa.domain.sample.SampleEntity</class>
 		<class>org.springframework.data.jpa.domain.sample.SampleEntityPK</class>
 		<class>org.springframework.data.jpa.domain.sample.SampleWithIdClass</class>
+		<class>org.springframework.data.jpa.domain.sample.SampleWithPrimitiveId</class>
 		<class>org.springframework.data.jpa.domain.sample.VersionedUser</class>
 		<class>org.springframework.data.jpa.domain.sample.AbstractMappedType</class>
 		<class>org.springframework.data.jpa.domain.sample.ConcreteType1</class>