diff --git a/core-tiger/src/main/java/org/springframework/ws/soap/server/endpoint/annotation/SoapFault.java b/core-tiger/src/main/java/org/springframework/ws/soap/server/endpoint/annotation/SoapFault.java
index 3c29f250..ca0d5b69 100644
--- a/core-tiger/src/main/java/org/springframework/ws/soap/server/endpoint/annotation/SoapFault.java
+++ b/core-tiger/src/main/java/org/springframework/ws/soap/server/endpoint/annotation/SoapFault.java
@@ -22,6 +22,7 @@ import java.lang.annotation.Inherited;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import javax.xml.namespace.QName;
 
 /**
  * Marks an exception class with the fault elements that should be returned whenever this exception is thrown.
@@ -41,6 +42,9 @@ public @interface SoapFault {
     /**
      * The custom fault code, to be used if {@link #faultCode()} is set to {@link FaultCode#CUSTOM}.
      * <p/>
+     * The format used is that of {@link QName#toString()}, i.e. "{" + Namespace URI + "}" + local part, where the
+     * namespace is optional.
+     * <p/>
      * Note that custom Fault Codes are only supported on SOAP 1.1.
      */
     String customFaultCode() default "";