diff --git a/pom.xml b/pom.xml
index 9bd2a654f..287b351e7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,7 +35,7 @@
     <commons.collections.version>4.01</commons.collections.version>
     <commons.lang.version>3.0.1</commons.lang.version>
     <guava.version>11.0.2</guava.version>
-    <ecj.version>3.7.2</ecj.version>
+    <ecj.version>4.3.1</ecj.version>
   </properties>
   
   <dependencies>
diff --git a/src/main/java/com/mysema/codegen/ECJEvaluatorFactory.java b/src/main/java/com/mysema/codegen/ECJEvaluatorFactory.java
index 4f9b79681..317b3e53f 100644
--- a/src/main/java/com/mysema/codegen/ECJEvaluatorFactory.java
+++ b/src/main/java/com/mysema/codegen/ECJEvaluatorFactory.java
@@ -13,6 +13,8 @@
  */
 package com.mysema.codegen;
 
+import javax.tools.JavaFileObject;
+import javax.tools.StandardLocation;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -22,18 +24,17 @@ import java.util.Locale;
 import java.util.Map;
 import java.util.StringTokenizer;
 
-import javax.tools.JavaFileObject;
-import javax.tools.StandardLocation;
-
+import com.google.common.base.Joiner;
+import com.google.common.base.Strings;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.common.io.ByteStreams;
+import com.mysema.codegen.model.ClassType;
+import com.mysema.codegen.model.Type;
 import org.eclipse.jdt.core.compiler.CategorizedProblem;
 import org.eclipse.jdt.core.compiler.CharOperation;
-import org.eclipse.jdt.internal.compiler.ClassFile;
-import org.eclipse.jdt.internal.compiler.CompilationResult;
+import org.eclipse.jdt.internal.compiler.*;
 import org.eclipse.jdt.internal.compiler.Compiler;
-import org.eclipse.jdt.internal.compiler.DefaultErrorHandlingPolicies;
-import org.eclipse.jdt.internal.compiler.ICompilerRequestor;
-import org.eclipse.jdt.internal.compiler.IErrorHandlingPolicy;
-import org.eclipse.jdt.internal.compiler.IProblemFactory;
 import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
 import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
 import org.eclipse.jdt.internal.compiler.env.ICompilationUnit;
@@ -43,14 +44,6 @@ import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
 import org.eclipse.jdt.internal.compiler.problem.DefaultProblemFactory;
 import org.eclipse.jdt.internal.compiler.tool.EclipseFileManager;
 
-import com.google.common.base.Joiner;
-import com.google.common.base.Strings;
-import com.google.common.collect.Lists;
-import com.google.common.collect.Maps;
-import com.google.common.io.ByteStreams;
-import com.mysema.codegen.model.ClassType;
-import com.mysema.codegen.model.Type;
-
 /**
  * EvaluatorFactory is a factory implementation for creating Evaluator instances
  * 
@@ -124,6 +117,11 @@ public class ECJEvaluatorFactory extends AbstractEvaluatorFactory {
             public char[] getFileName() {
                 return CharOperation.concat(targetName.toCharArray(), ".java".toCharArray());
             }
+
+            @Override
+            public boolean ignoreOptionalProblems() {
+                return true;
+            }
         } };
         
         INameEnvironment env = new INameEnvironment() {