diff --git a/src/main/java/org/springframework/data/util/ParameterizedTypeInformation.java b/src/main/java/org/springframework/data/util/ParameterizedTypeInformation.java
index c466c275f..42d750ae7 100644
--- a/src/main/java/org/springframework/data/util/ParameterizedTypeInformation.java
+++ b/src/main/java/org/springframework/data/util/ParameterizedTypeInformation.java
@@ -56,9 +56,13 @@ class ParameterizedTypeInformation<T> extends ParentTypeAwareTypeInformation<T>
 	@SuppressWarnings("deprecation")
 	public TypeInformation<?> getMapValueType() {
 
-		if (Map.class.equals(getType())) {
+		if (Map.class.isAssignableFrom(getType())) {
+
 			Type[] arguments = type.getActualTypeArguments();
-			return createInfo(arguments[1]);
+
+			if (arguments.length > 1) {
+				return createInfo(arguments[1]);
+			}
 		}
 
 		Class<?> rawType = getType();
diff --git a/src/test/java/org/springframework/data/util/ClassTypeInformationUnitTests.java b/src/test/java/org/springframework/data/util/ClassTypeInformationUnitTests.java
index 9975d097f..e9b87faf5 100644
--- a/src/test/java/org/springframework/data/util/ClassTypeInformationUnitTests.java
+++ b/src/test/java/org/springframework/data/util/ClassTypeInformationUnitTests.java
@@ -25,6 +25,7 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.SortedMap;
 
 import org.hamcrest.Matchers;
 import org.junit.Test;
@@ -296,6 +297,26 @@ public class ClassTypeInformationUnitTests {
 		assertThat(from(MyIterable.class).getComponentType(), is(notNullValue()));
 	}
 
+	/**
+	 * @see DATACMNS-440
+	 */
+	@Test
+	public void detectsSpecialMapAsMapValueType() {
+
+		TypeInformation<SuperGenerics> information = ClassTypeInformation.from(SuperGenerics.class);
+
+		TypeInformation<?> propertyInformation = information.getProperty("seriously");
+		assertThat(propertyInformation.getType(), is((Object) SortedMap.class));
+
+		TypeInformation<?> mapValueType = propertyInformation.getMapValueType();
+		assertThat(mapValueType.getType(), is((Object) SortedMap.class));
+		assertThat(mapValueType.getComponentType().getType(), is((Object) String.class));
+
+		TypeInformation<?> nestedValueType = mapValueType.getMapValueType();
+		assertThat(nestedValueType.getType(), is((Object) List.class));
+		assertThat(nestedValueType.getComponentType().getType(), is((Object) Person.class));
+	}
+
 	static class StringMapContainer extends MapContainer<String> {
 
 	}
@@ -425,4 +446,9 @@ public class ClassTypeInformationUnitTests {
 	interface MyRawIterable extends Iterable {}
 
 	interface MyIterable<T> extends Iterable<T> {}
+
+	static class SuperGenerics {
+
+		SortedMap<String, ? extends SortedMap<String, List<Person>>> seriously;
+	}
 }