diff --git a/src/main/java/com/samskivert/depot/impl/expression/RandomExp.java b/src/main/java/com/samskivert/depot/impl/expression/RandomExp.java
new file mode 100644
index 0000000..03f2269
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+++ b/src/main/java/com/samskivert/depot/impl/expression/RandomExp.java
@@ -0,0 +1,32 @@
+//
+// Depot library - a Java relational persistence library
+// https://github.com/threerings/depot/blob/master/LICENSE
+
+package com.samskivert.depot.impl.expression;
+
+import java.util.Collection;
+
+import com.samskivert.depot.PersistentRecord;
+import com.samskivert.depot.expression.SQLExpression;
+import com.samskivert.depot.impl.FragmentVisitor;
+
+/**
+ * An expression for use with OrderBy, for randomizing the order.
+ */
+public enum RandomExp
+    implements SQLExpression<Object>
+{
+    /** Enum singleton pattern. */
+    INSTANCE;
+
+    // from SQLFragment
+    public Object accept (FragmentVisitor<?> builder)
+    {
+        return builder.visit(this);
+    }
+
+    // from SQLFragment
+    public void addClasses (Collection<Class<? extends PersistentRecord>> classSet)
+    {
+    }
+}