diff --git a/src/com/backendless/property/AbstractProperty.java b/src/com/backendless/property/AbstractProperty.java
index 2986be04f..0c0644fa2 100644
--- a/src/com/backendless/property/AbstractProperty.java
+++ b/src/com/backendless/property/AbstractProperty.java
@@ -21,6 +21,7 @@
 public abstract class AbstractProperty
 {
   private String name;
+  private String expression;
   private boolean required;
   private DateTypeEnum type;
 
@@ -34,6 +35,16 @@ public void setName( String name )
     this.name = name;
   }
 
+  public String getExpression()
+  {
+    return expression;
+  }
+
+  public void setExpression( String expression )
+  {
+    this.expression = expression;
+  }
+
   public boolean isRequired()
   {
     return required;