diff --git a/src/main/java/com/mysema/query/grammar/Grammar.java b/src/main/java/com/mysema/query/grammar/Grammar.java
index 2532ffc31..c3685a5f1 100644
--- a/src/main/java/com/mysema/query/grammar/Grammar.java
+++ b/src/main/java/com/mysema/query/grammar/Grammar.java
@@ -158,8 +158,7 @@ public class Grammar {
     }   
     
     public static <A extends Comparable<A>> BooleanExpr in(Expr<A> left, A... rest){
-        // TODO
-        return null;
+        return _binOp(Op.IN, left, _const(rest));
     }
     
     public static BooleanExpr like(Expr<String> left, String right){
diff --git a/src/main/java/com/mysema/query/grammar/Types.java b/src/main/java/com/mysema/query/grammar/Types.java
index 467e0198c..dcda9f7c9 100644
--- a/src/main/java/com/mysema/query/grammar/Types.java
+++ b/src/main/java/com/mysema/query/grammar/Types.java
@@ -128,7 +128,8 @@ public class Types {
     public interface Op<RT> {
         Op<Boolean> EQ = new OpImpl<Boolean>();
         Op<Boolean> ISTYPEOF = new OpImpl<Boolean>();
-        Op<Boolean> NE = new OpImpl<Boolean>();        
+        Op<Boolean> NE = new OpImpl<Boolean>();
+        Op<Boolean> IN = new OpImpl<Boolean>();
     }
     
     public interface Operation<RT> extends Expr<RT> {}