diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/BooleanExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/BooleanExpression.java
index cfb630759..720753623 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/BooleanExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/BooleanExpression.java
@@ -29,7 +29,7 @@ public abstract class BooleanExpression extends LiteralExpression<Boolean> imple
     private static final long serialVersionUID = 3797956062512074164L;
 
     @Nullable
-    private volatile BooleanExpression eqTrue, eqFalse;
+    private transient volatile BooleanExpression eqTrue, eqFalse;
 
     @Nullable
     private volatile BooleanExpression not;
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/CollectionExpressionBase.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/CollectionExpressionBase.java
index b87525ef1..d460333ee 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/CollectionExpressionBase.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/CollectionExpressionBase.java
@@ -36,10 +36,10 @@ public abstract class CollectionExpressionBase<T extends Collection<E>, E> exten
     private static final long serialVersionUID = 691230660037162054L;
 
     @Nullable
-    private volatile BooleanExpression empty;
+    private transient volatile BooleanExpression empty;
 
     @Nullable
-    private volatile NumberExpression<Integer> size;
+    private transient volatile NumberExpression<Integer> size;
 
     public CollectionExpressionBase(Expression<T> mixin) {
         super(mixin);
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateExpression.java
index 0cb560954..1eec93da9 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateExpression.java
@@ -54,13 +54,13 @@ public abstract class DateExpression<T extends Comparable> extends TemporalExpre
     }
 
     @Nullable
-    private volatile NumberExpression<Integer> dayOfMonth, dayOfWeek, dayOfYear;
+    private transient volatile NumberExpression<Integer> dayOfMonth, dayOfWeek, dayOfYear;
 
     @Nullable
-    private volatile DateExpression<T> min, max;
+    private transient volatile DateExpression<T> min, max;
 
     @Nullable
-    private volatile NumberExpression<Integer> week, month, year, yearMonth, yearWeek;
+    private transient volatile NumberExpression<Integer> week, month, year, yearMonth, yearWeek;
 
     public DateExpression(Expression<T> mixin) {
         super(mixin);
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateTimeExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateTimeExpression.java
index f3b9f03b5..d195d1739 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateTimeExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/DateTimeExpression.java
@@ -73,16 +73,16 @@ public abstract class DateTimeExpression<T extends Comparable> extends TemporalE
     }
 
     @Nullable
-    private volatile NumberExpression<Integer> dayOfMonth, dayOfWeek, dayOfYear;
+    private transient volatile NumberExpression<Integer> dayOfMonth, dayOfWeek, dayOfYear;
 
     @Nullable
-    private volatile NumberExpression<Integer> hours, minutes, seconds, milliseconds;
+    private transient volatile NumberExpression<Integer> hours, minutes, seconds, milliseconds;
 
     @Nullable
-    private volatile DateTimeExpression<T> min, max;
+    private transient volatile DateTimeExpression<T> min, max;
 
     @Nullable
-    private volatile NumberExpression<Integer> week, month, year, yearMonth, yearWeek;
+    private transient volatile NumberExpression<Integer> week, month, year, yearMonth, yearWeek;
 
     public DateTimeExpression(Expression<T> mixin) {
         super(mixin);
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/EnumExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/EnumExpression.java
index 6dba76545..9b322ea37 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/EnumExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/EnumExpression.java
@@ -26,6 +26,8 @@ public abstract class EnumExpression<T extends Enum<T>> extends LiteralExpressio
 
     private static final long serialVersionUID = 8819222316513862829L;
 
+    private transient volatile NumberExpression<Integer> ordinal;
+
     public EnumExpression(Expression<T> mixin) {
         super(mixin);
     }
@@ -46,7 +48,10 @@ public abstract class EnumExpression<T extends Enum<T>> extends LiteralExpressio
      * @return ordinal number
      */
     public NumberExpression<Integer> ordinal() {
-        return Expressions.numberOperation(Integer.class, Ops.ORDINAL, mixin);
+        if (ordinal == null) {
+            ordinal = Expressions.numberOperation(Integer.class, Ops.ORDINAL, mixin);
+        }
+        return ordinal;
     }
 
 }
\ No newline at end of file
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/LiteralExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/LiteralExpression.java
index 92a796645..24b8d2415 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/LiteralExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/LiteralExpression.java
@@ -27,7 +27,7 @@ import com.querydsl.core.types.Ops;
 public abstract class LiteralExpression<T extends Comparable> extends ComparableExpression<T> {
 
     @Nullable
-    private volatile StringExpression stringCast;
+    private transient volatile StringExpression stringCast;
 
     public LiteralExpression(Expression<T> mixin) {
         super(mixin);
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/NumberExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/NumberExpression.java
index 456093dc7..36a4aabf5 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/NumberExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/NumberExpression.java
@@ -71,16 +71,16 @@ public abstract class NumberExpression<T extends Number & Comparable<?>> extends
     }
 
     @Nullable
-    private volatile NumberExpression<T> abs, sum, min, max, floor, ceil, round;
+    private transient volatile NumberExpression<T> abs, sum, min, max, floor, ceil, round;
 
     @Nullable
-    private volatile NumberExpression<Double> avg, sqrt;
+    private transient volatile NumberExpression<Double> avg, sqrt;
 
     @Nullable
-    private volatile NumberExpression<T> negation;
+    private transient volatile NumberExpression<T> negation;
 
     @Nullable
-    private volatile StringExpression stringCast;
+    private transient volatile StringExpression stringCast;
 
     public NumberExpression(Expression<T> mixin) {
         super(mixin);
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/SimpleExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/SimpleExpression.java
index 59c22c29f..be6b971ca 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/SimpleExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/SimpleExpression.java
@@ -32,13 +32,13 @@ public abstract class SimpleExpression<T> extends DslExpression<T> {
     private static final long serialVersionUID = -4405387187738167105L;
 
     @Nullable
-    private volatile NumberExpression<Long> count;
+    private transient volatile NumberExpression<Long> count;
 
     @Nullable
-    private volatile NumberExpression<Long> countDistinct;
+    private transient volatile NumberExpression<Long> countDistinct;
 
     @Nullable
-    private volatile BooleanExpression isnull, isnotnull;
+    private transient volatile BooleanExpression isnull, isnotnull;
 
     public SimpleExpression(Expression<T> mixin) {
         super(mixin);
diff --git a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/StringExpression.java b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/StringExpression.java
index b02030ecb..4dba60dab 100644
--- a/querydsl-core/src/main/java/com/querydsl/core/types/dsl/StringExpression.java
+++ b/querydsl-core/src/main/java/com/querydsl/core/types/dsl/StringExpression.java
@@ -28,16 +28,16 @@ public abstract class StringExpression extends LiteralExpression<String> {
     private static final long serialVersionUID = 1536955079961023361L;
 
     @Nullable
-    private volatile NumberExpression<Integer> length;
+    private transient volatile NumberExpression<Integer> length;
 
     @Nullable
-    private volatile StringExpression lower, trim, upper;
+    private transient volatile StringExpression lower, trim, upper;
 
     @Nullable
-    private volatile StringExpression min, max;
+    private transient volatile StringExpression min, max;
 
     @Nullable
-    private volatile BooleanExpression isempty;
+    private transient volatile BooleanExpression isempty;
 
     public StringExpression(Expression<String> mixin) {
         super(mixin);