diff --git a/querydsl-core/src/main/java/com/querydsl/core/support/DetachableMixin.java b/querydsl-core/src/main/java/com/querydsl/core/support/DetachableMixin.java
index 784023087..5c4c833cb 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/support/DetachableMixin.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/support/DetachableMixin.java
@@ -86,7 +86,7 @@ public class DetachableMixin implements Detachable {
         } else if (arg != null) {
             return ConstantImpl.create(arg);
         } else {
-            return NullExpression.DEFAULT;
+            return Expressions.nullExpression();
         }
     }
 
@@ -123,7 +123,7 @@ public class DetachableMixin implements Detachable {
     }
 
     private Expression<?> nullAsTemplate(@Nullable Expression<?> expr) {
-        return expr != null ? expr : NullExpression.DEFAULT;
+        return expr != null ? expr : Expressions.nullExpression();
     }
 
     @SuppressWarnings("unchecked")
diff --git a/querydsl-core/src/main/java/com/querydsl/core/support/Expressions.java b/querydsl-core/src/main/java/com/querydsl/core/support/Expressions.java
index be729ccb8..fc77d23d5 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/support/Expressions.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/support/Expressions.java
@@ -77,7 +77,7 @@ public final class Expressions {
     @SuppressWarnings("unchecked")
     public static <D> SimpleExpression<D> as(Expression<D> source, Path<D> alias) {
         if (source == null) {
-            return as((Expression)NullExpression.DEFAULT, alias);
+            return as((Expression)nullExpression(), alias);
         } else {
             return SimpleOperation.create((Class<D>)alias.getType(), Ops.ALIAS, source, alias);
         }
@@ -163,7 +163,7 @@ public final class Expressions {
     @SuppressWarnings({ "unchecked", "rawtypes" })
     public static <D> SimpleExpression<D> constantAs(D source, Path<D> alias) {
         if (source == null) {
-            return as((Expression)NullExpression.DEFAULT, alias);
+            return as((Expression)nullExpression(), alias);
         } else {
             return as(ConstantImpl.create(source), alias);
         }
@@ -632,6 +632,37 @@ public final class Expressions {
         return rv;
     }
 
+    /**
+     * Get the default null expression
+     *
+     * @return
+     */
+    public static NullExpression<Object> nullExpression() {
+        return NullExpression.DEFAULT;
+    }
+
+    /**
+     * Get a null expression for the given type
+     *
+     * @param type
+     * @param <T>
+     * @return
+     */
+    public static <T> NullExpression<T> nullExpression(Class<T> type) {
+        return new NullExpression<T>(type);
+    }
+
+    /**
+     * Get a null expression for the given path
+     *
+     * @param path
+     * @param <T>
+     * @return
+     */
+    public static <T> NullExpression<T> nullExpression(Path<T> path) {
+        return new NullExpression<T>(path.getType());
+    }
+
     private Expressions() {}
 
 }
diff --git a/querydsl-core/src/test/java/com/querydsl/core/support/DetachableMixinTest.java b/querydsl-core/src/test/java/com/querydsl/core/support/DetachableMixinTest.java
index b33a06f1f..252116486 100644
--- a/querydsl-core/src/test/java/com/querydsl/core/support/DetachableMixinTest.java
+++ b/querydsl-core/src/test/java/com/querydsl/core/support/DetachableMixinTest.java
@@ -76,7 +76,7 @@ public class DetachableMixinTest {
         SubQueryExpression<?> subQuery = detachable.unique(new PathImpl(Object.class, "x"), null);
         List<? extends Expression<?>> exprs = ((FactoryExpression)subQuery.getMetadata().getProjection()).getArgs();
         assertEquals(new PathImpl(Object.class, "x"), exprs.get(0));
-        assertEquals(NullExpression.DEFAULT, exprs.get(1));
+        assertEquals(Expressions.nullExpression(), exprs.get(1));
     }
 
 }
diff --git a/querydsl-jdo/src/main/java/com/querydsl/jdo/dml/JDOUpdateClause.java b/querydsl-jdo/src/main/java/com/querydsl/jdo/dml/JDOUpdateClause.java
index 4672611de..39c1b8c5d 100644
--- a/querydsl-jdo/src/main/java/com/querydsl/jdo/dml/JDOUpdateClause.java
+++ b/querydsl-jdo/src/main/java/com/querydsl/jdo/dml/JDOUpdateClause.java
@@ -22,7 +22,6 @@ import com.querydsl.core.QueryMetadata;
 import com.querydsl.core.dml.UpdateClause;
 import com.querydsl.core.support.Expressions;
 import com.querydsl.core.types.Expression;
-import com.querydsl.core.types.NullExpression;
 import com.querydsl.core.types.Path;
 import com.querydsl.core.types.Predicate;
 
@@ -51,7 +50,7 @@ public class JDOUpdateClause implements UpdateClause<JDOUpdateClause> {
             if (values.get(i) != null) {
                 updates.put(paths.get(i), Expressions.constant(values.get(i)));
             } else {
-                updates.put(paths.get(i), new NullExpression(paths.get(i).getType()));
+                updates.put(paths.get(i), Expressions.nullExpression(paths.get(i)));
             }
         }
         return this;
@@ -62,7 +61,7 @@ public class JDOUpdateClause implements UpdateClause<JDOUpdateClause> {
         if (value != null) {
             updates.put(path, Expressions.constant(value));
         } else {
-            updates.put(path, new NullExpression<T>(path.getType()));
+            updates.put(path, Expressions.nullExpression(path));
         }
         return this;
     }
@@ -76,7 +75,7 @@ public class JDOUpdateClause implements UpdateClause<JDOUpdateClause> {
     
     @Override
     public <T> JDOUpdateClause setNull(Path<T> path) {
-        updates.put(path, new NullExpression<T>(path.getType()));
+        updates.put(path, Expressions.nullExpression(path));
         return this;
     }
     
diff --git a/querydsl-jpa/src/main/java/com/querydsl/jpa/hibernate/HibernateUpdateClause.java b/querydsl-jpa/src/main/java/com/querydsl/jpa/hibernate/HibernateUpdateClause.java
index 6ccac3e44..950052925 100644
--- a/querydsl-jpa/src/main/java/com/querydsl/jpa/hibernate/HibernateUpdateClause.java
+++ b/querydsl-jpa/src/main/java/com/querydsl/jpa/hibernate/HibernateUpdateClause.java
@@ -107,7 +107,7 @@ public class HibernateUpdateClause implements
     
     @Override
     public <T> HibernateUpdateClause setNull(Path<T> path) {
-        updates.put(path, new NullExpression<T>(path.getType()));
+        updates.put(path, Expressions.nullExpression(path));
         return this;
     }
 
@@ -118,7 +118,7 @@ public class HibernateUpdateClause implements
             if (values.get(i) != null) {
                 updates.put(paths.get(i), Expressions.constant(values.get(i)));
             } else {
-                updates.put(paths.get(i), new NullExpression(paths.get(i).getType()));
+                updates.put(paths.get(i), Expressions.nullExpression(paths.get(i)));
             }
 
         }
diff --git a/querydsl-jpa/src/main/java/com/querydsl/jpa/impl/JPAUpdateClause.java b/querydsl-jpa/src/main/java/com/querydsl/jpa/impl/JPAUpdateClause.java
index 8fe0f2e48..1a29a90d5 100644
--- a/querydsl-jpa/src/main/java/com/querydsl/jpa/impl/JPAUpdateClause.java
+++ b/querydsl-jpa/src/main/java/com/querydsl/jpa/impl/JPAUpdateClause.java
@@ -96,7 +96,7 @@ public class JPAUpdateClause implements UpdateClause<JPAUpdateClause> {
     
     @Override
     public <T> JPAUpdateClause setNull(Path<T> path) {
-        updates.put(path, new NullExpression<T>(path.getType()));
+        updates.put(path, Expressions.nullExpression(path));
         return this;
     }
 
@@ -107,7 +107,7 @@ public class JPAUpdateClause implements UpdateClause<JPAUpdateClause> {
             if (values.get(i) != null) {
                 updates.put(paths.get(i), Expressions.constant(values.get(i)));
             } else {
-                updates.put(paths.get(i), new NullExpression(paths.get(i).getType()));
+                updates.put(paths.get(i), Expressions.nullExpression(paths.get(i)));
             }
         }
         return this;