diff --git a/src/main/java/org/springframework/data/projection/ProxyProjectionFactory.java b/src/main/java/org/springframework/data/projection/ProxyProjectionFactory.java
index 117a4dd46..7e7f9081c 100644
--- a/src/main/java/org/springframework/data/projection/ProxyProjectionFactory.java
+++ b/src/main/java/org/springframework/data/projection/ProxyProjectionFactory.java
@@ -82,8 +82,8 @@ class ProxyProjectionFactory implements ProjectionFactory, ResourceLoaderAware,
 		Assert.notNull(projectionType, "Projection type must not be null!");
 		Assert.isTrue(projectionType.isInterface(), "Projection type must be an interface!");
 
-		if (source == null) {
-			return null;
+		if (source == null || projectionType.isInstance(source)) {
+			return (T) source;
 		}
 
 		ProxyFactory factory = new ProxyFactory();
diff --git a/src/test/java/org/springframework/data/projection/ProxyProjectionFactoryUnitTests.java b/src/test/java/org/springframework/data/projection/ProxyProjectionFactoryUnitTests.java
index 2c683c8ca..4d1905ceb 100644
--- a/src/test/java/org/springframework/data/projection/ProxyProjectionFactoryUnitTests.java
+++ b/src/test/java/org/springframework/data/projection/ProxyProjectionFactoryUnitTests.java
@@ -264,7 +264,17 @@ public class ProxyProjectionFactoryUnitTests {
 		assertThat(data.get("key"), is(nullValue()));
 	}
 
-	static class Customer {
+	@Test // DATACMNS-1121
+	public void doesNotCreateWrappingProxyIfTargetImplementsProjectionInterface() {
+
+		Customer customer = new Customer();
+
+		assertThat(factory.createProjection(Contact.class, customer) == customer, is(true));
+	}
+
+	interface Contact {}
+
+	static class Customer implements Contact {
 
 		public Long id;
 		public String firstname, lastname;