diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverter.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverter.java
index be2f90b13..b2726f960 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverter.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverter.java
@@ -75,15 +75,13 @@ public abstract class AbstractMongoConverter implements MongoConverter, Initiali
 	 */
 	private void initializeConverters() {
 
-		if (!conversionService.canConvert(ObjectId.class, String.class)) {
-			conversionService.addConverter(ObjectIdToStringConverter.INSTANCE);
-		}
-		if (!conversionService.canConvert(String.class, ObjectId.class)) {
-			conversionService.addConverter(StringToObjectIdConverter.INSTANCE);
-		}
+		conversionService.addConverter(ObjectIdToStringConverter.INSTANCE);
+		conversionService.addConverter(StringToObjectIdConverter.INSTANCE);
+
 		if (!conversionService.canConvert(ObjectId.class, BigInteger.class)) {
 			conversionService.addConverter(ObjectIdToBigIntegerConverter.INSTANCE);
 		}
+
 		if (!conversionService.canConvert(BigInteger.class, ObjectId.class)) {
 			conversionService.addConverter(BigIntegerToObjectIdConverter.INSTANCE);
 		}
diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverterUnitTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverterUnitTests.java
new file mode 100644
index 000000000..717bd5a69
--- /dev/null
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverterUnitTests.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2015 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.mongodb.core.convert;
+
+import static org.mockito.Mockito.*;
+
+import org.junit.Test;
+import org.springframework.core.convert.support.DefaultConversionService;
+import org.springframework.core.convert.support.GenericConversionService;
+import org.springframework.data.mapping.context.MappingContext;
+import org.springframework.data.mongodb.core.convert.MongoConverters.ObjectIdToStringConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverters.StringToObjectIdConverter;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
+import org.springframework.data.util.TypeInformation;
+
+import com.mongodb.DBObject;
+import com.mongodb.DBRef;
+
+/**
+ * Unit tests for {@link AbstractMongoConverter}.
+ * 
+ * @author Oliver Gierke
+ */
+public class AbstractMongoConverterUnitTests {
+
+	/**
+	 * @see DATAMONGO-1324
+	 */
+	@Test
+	public void registersObjectIdConvertersExplicitly() {
+
+		DefaultConversionService conversionService = spy(new DefaultConversionService());
+
+		new SampleMongoConverter(conversionService).afterPropertiesSet();
+
+		verify(conversionService).addConverter(StringToObjectIdConverter.INSTANCE);
+		verify(conversionService).addConverter(ObjectIdToStringConverter.INSTANCE);
+	}
+
+	static class SampleMongoConverter extends AbstractMongoConverter {
+
+		public SampleMongoConverter(GenericConversionService conversionService) {
+			super(conversionService);
+		}
+
+		@Override
+		public MongoTypeMapper getTypeMapper() {
+			throw new UnsupportedOperationException();
+		}
+
+		@Override
+		public MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty> getMappingContext() {
+			throw new UnsupportedOperationException();
+		}
+
+		@Override
+		public <R> R read(Class<R> type, DBObject source) {
+			throw new UnsupportedOperationException();
+		}
+
+		@Override
+		public void write(Object source, DBObject sink) {
+			throw new UnsupportedOperationException();
+		}
+
+		@Override
+		public Object convertToMongoType(Object obj, TypeInformation<?> typeInformation) {
+			throw new UnsupportedOperationException();
+		}
+
+		@Override
+		public DBRef toDBRef(Object object, MongoPersistentProperty referingProperty) {
+			throw new UnsupportedOperationException();
+		}
+	}
+}