diff --git a/processor/src/main/java/org/mapstruct/ap/model/assignment/AdderWrapper.java b/processor/src/main/java/org/mapstruct/ap/model/assignment/AdderWrapper.java
index b3e0f1038..49cf519b8 100644
--- a/processor/src/main/java/org/mapstruct/ap/model/assignment/AdderWrapper.java
+++ b/processor/src/main/java/org/mapstruct/ap/model/assignment/AdderWrapper.java
@@ -19,7 +19,9 @@
 package org.mapstruct.ap.model.assignment;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 import org.mapstruct.ap.model.Assignment;
 import org.mapstruct.ap.model.common.Type;
@@ -69,6 +71,14 @@ public class AdderWrapper extends AssignmentWrapper {
         return sourceReference;
     }
 
+    @Override
+    public Set<Type> getImportTypes() {
+        Set<Type> imported = new HashSet<Type>();
+        imported.addAll( super.getImportTypes() );
+        imported.add( sourceType );
+        return imported;
+    }
+
     public String getIteratorReference() {
         return getAssignment().getSourceReference();
     }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/collection/adder/AdderTest.java b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/AdderTest.java
index bf0569361..0f17990f8 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/collection/adder/AdderTest.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/AdderTest.java
@@ -20,6 +20,7 @@ package org.mapstruct.ap.test.collection.adder;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import static org.fest.assertions.Assertions.assertThat;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -40,9 +41,11 @@ import org.mapstruct.ap.testutil.IssueKey;
 import org.mapstruct.ap.testutil.WithClasses;
 import org.mapstruct.ap.testutil.runner.AnnotationProcessorTestRunner;
 
-import static org.fest.assertions.Assertions.assertThat;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
+import org.mapstruct.ap.test.collection.adder.source.Foo;
+import org.mapstruct.ap.test.collection.adder.source.Source2;
+import org.mapstruct.ap.test.collection.adder.target.Target2;
 
 /**
  * @author Sjaak Derksen
@@ -239,4 +242,22 @@ public class AdderTest {
         assertThat( target.getPets().get( 0 ) ).isEqualTo( 2L );
         assertTrue( AdderUsageObserver.isUsed() );
     }
+
+    @IssueKey( "310" )
+    @Test
+    @WithClasses( {
+        Target2.class,
+        Source2.class,
+        Source2Target2Mapper.class,
+        Foo.class
+    } )
+    public void testMissingImport() throws DogException {
+
+        Source2 source = new Source2();
+        source.setAttributes( Arrays.asList( new Foo() ) );
+
+        Target2 target = Source2Target2Mapper.INSTANCE.toTarget( source );
+        assertThat( target ).isNotNull();
+        assertThat( target.getAttributes().size() ).isEqualTo( 1 );
+    }
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/collection/adder/Source2Target2Mapper.java b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/Source2Target2Mapper.java
new file mode 100644
index 000000000..825e86db2
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/Source2Target2Mapper.java
@@ -0,0 +1,38 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  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.mapstruct.ap.test.collection.adder;
+
+import org.mapstruct.CollectionMappingStrategy;
+import org.mapstruct.Mapper;
+import org.mapstruct.ap.test.collection.adder.source.Source2;
+import org.mapstruct.ap.test.collection.adder.target.Target2;
+import org.mapstruct.factory.Mappers;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+@Mapper( collectionMappingStrategy = CollectionMappingStrategy.ADDER_PREFERRED )
+public abstract class Source2Target2Mapper {
+
+    public static final Source2Target2Mapper INSTANCE = Mappers.getMapper( Source2Target2Mapper.class );
+
+    public abstract Target2 toTarget( Source2 source );
+
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/collection/adder/source/Foo.java b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/source/Foo.java
new file mode 100644
index 000000000..bb12a1485
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/source/Foo.java
@@ -0,0 +1,27 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  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.mapstruct.ap.test.collection.adder.source;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+public class Foo {
+
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/collection/adder/source/Source2.java b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/source/Source2.java
new file mode 100644
index 000000000..741ceaf89
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/source/Source2.java
@@ -0,0 +1,39 @@
+/**
+ *  Copyright 2012-2014 Gunnar Morling (http://www.gunnarmorling.de/)
+ *  and/or other contributors as indicated by the @authors tag. See the
+ *  copyright.txt file in the distribution for a full listing of all
+ *  contributors.
+ *
+ *  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.mapstruct.ap.test.collection.adder.source;
+
+import java.util.List;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+public class Source2 {
+
+    private List<Foo> attributes;
+
+    public List<Foo> getAttributes() {
+        return attributes;
+    }
+
+    public void setAttributes( List<Foo> attributes ) {
+        this.attributes = attributes;
+    }
+
+}
diff --git a/processor/src/test/java/org/mapstruct/ap/test/collection/adder/target/Target2.java b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/target/Target2.java
new file mode 100644
index 000000000..3350ab476
--- /dev/null
+++ b/processor/src/test/java/org/mapstruct/ap/test/collection/adder/target/Target2.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2014 Sjaak Derksen.
+ *
+ * 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.mapstruct.ap.test.collection.adder.target;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.mapstruct.ap.test.collection.adder.source.Foo;
+
+/**
+ *
+ * @author Sjaak Derksen
+ */
+public class Target2 {
+
+    private List<Foo> attributes = new ArrayList<Foo>();
+
+    public Foo addAttribute( Foo foo ) {
+        attributes.add( foo );
+        return foo;
+    }
+
+    public List<Foo> getAttributes() {
+        return attributes;
+    }
+
+    public void setAttributes( List<Foo> attributes ) {
+        this.attributes = attributes;
+    }
+
+}