diff --git a/querydsl-jpa/src/main/java/com/mysema/query/jpa/HibernateSQLSerializer.java b/querydsl-jpa/src/main/java/com/mysema/query/jpa/HibernateSQLSerializer.java
index 8774207f7..acbe66899 100644
--- a/querydsl-jpa/src/main/java/com/mysema/query/jpa/HibernateSQLSerializer.java
+++ b/querydsl-jpa/src/main/java/com/mysema/query/jpa/HibernateSQLSerializer.java
@@ -6,6 +6,7 @@
 package com.mysema.query.jpa;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 
 import com.mysema.query.sql.SQLSerializer;
@@ -30,16 +31,33 @@ public final class HibernateSQLSerializer extends SQLSerializer{
 
     @Override
     public Void visit(Constant<?> expr, Void context) {
-        if (!getConstantToLabel().containsKey(expr.getConstant())) {
-            String constLabel = getConstantPrefix() + (getConstantToLabel().size() + 1);
-            getConstantToLabel().put(expr.getConstant(), constLabel);
-            append(":"+constLabel);
-        } else {
-            append(":"+getConstantToLabel().get(expr.getConstant()));
+        if (expr.getConstant() instanceof Collection<?>) {
+            append("(");
+            boolean first = true;
+            for (Object element : ((Collection<?>)expr.getConstant())) {
+                if (!first){
+                    append(", ");
+                }
+                visitConstant(element);
+                first = false;
+            }            
+            append(")");
+        }else {
+            visitConstant(expr.getConstant());    
         }
         return null;
     }
 
+    private void visitConstant(Object constant){
+        if (!getConstantToLabel().containsKey(constant)) {
+            String constLabel = getConstantPrefix() + (getConstantToLabel().size() + 1);
+            getConstantToLabel().put(constant, constLabel);
+            append(":"+constLabel);
+        } else {
+            append(":"+getConstantToLabel().get(constant));
+        }
+    }
+    
     @Override
     public Void visit(Path<?> path, Void context) {
         if (path.getMetadata().getParent() == null && !path.getType().equals(path.getClass())){
diff --git a/querydsl-jpa/src/test/java/com/mysema/query/jpa/HibernateSQLSerializerTest.java b/querydsl-jpa/src/test/java/com/mysema/query/jpa/HibernateSQLSerializerTest.java
new file mode 100644
index 000000000..3c5922ad1
--- /dev/null
+++ b/querydsl-jpa/src/test/java/com/mysema/query/jpa/HibernateSQLSerializerTest.java
@@ -0,0 +1,29 @@
+package com.mysema.query.jpa;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Ignore;
+import org.junit.Test;
+
+import com.mysema.query.DefaultQueryMetadata;
+import com.mysema.query.JoinType;
+import com.mysema.query.jpa.domain.sql.SAnimal;
+import com.mysema.query.sql.MySQLTemplates;
+
+
+public class HibernateSQLSerializerTest {
+    
+    @Test
+    @Ignore
+    public void In() {
+        HibernateSQLSerializer serializer = new HibernateSQLSerializer(new MySQLTemplates());
+        DefaultQueryMetadata md = new DefaultQueryMetadata();
+        SAnimal cat = SAnimal.animal;
+        md.addJoin(JoinType.DEFAULT, cat);
+        md.addWhere(cat.name.in("X", "Y"));
+        md.addProjection(cat.id);
+        serializer.serialize(md, false);
+        assertEquals("cat.*.id in :a1", serializer.toString());        
+    }
+
+}
diff --git a/querydsl-jpa/src/test/java/com/mysema/query/jpa/hibernate/sql/DerbySQLTest.java b/querydsl-jpa/src/test/java/com/mysema/query/jpa/hibernate/sql/DerbySQLTest.java
index 7cc2c3c4d..7bcda1405 100644
--- a/querydsl-jpa/src/test/java/com/mysema/query/jpa/hibernate/sql/DerbySQLTest.java
+++ b/querydsl-jpa/src/test/java/com/mysema/query/jpa/hibernate/sql/DerbySQLTest.java
@@ -55,6 +55,11 @@ public class DerbySQLTest {
         session.save(new Cat("Tim",6));
         session.flush();
     }
+    
+    @Test
+    public void In(){
+        assertEquals(6l, query().from(cat).where(cat.dtype.in("C", "CX")).count());
+    }
 
     @Test
     public void Count(){