diff --git a/extensions/webservices/public/nsISOAPAttachments.idl b/extensions/webservices/public/nsISOAPAttachments.idl
index febc1784b94..b85f9b09e9c 100644
--- a/extensions/webservices/public/nsISOAPAttachments.idl
+++ b/extensions/webservices/public/nsISOAPAttachments.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 /**
  * This interface permits attachment of SOAP attachments.
  */
diff --git a/extensions/webservices/public/nsISOAPBlock.idl b/extensions/webservices/public/nsISOAPBlock.idl
index a5722078d0c..7912a138f29 100644
--- a/extensions/webservices/public/nsISOAPBlock.idl
+++ b/extensions/webservices/public/nsISOAPBlock.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 interface nsIVariant;
 interface nsISOAPEncoding;
diff --git a/extensions/webservices/public/nsISOAPCall.idl b/extensions/webservices/public/nsISOAPCall.idl
index f74e48ccd12..798d35a49c5 100644
--- a/extensions/webservices/public/nsISOAPCall.idl
+++ b/extensions/webservices/public/nsISOAPCall.idl
@@ -23,6 +23,10 @@
 #include "nsISupports.idl"
 #include "nsISOAPMessage.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsISOAPResponse;
 interface nsISOAPResponseListener;
 interface nsISOAPCallCompletion;
diff --git a/extensions/webservices/public/nsISOAPEncoder.idl b/extensions/webservices/public/nsISOAPEncoder.idl
index 977cd0a3405..32c1c478b38 100644
--- a/extensions/webservices/public/nsISOAPEncoder.idl
+++ b/extensions/webservices/public/nsISOAPEncoder.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsISchemaType;
 interface nsISOAPEncoding;
 interface nsIVariant;
diff --git a/extensions/webservices/public/nsISOAPFault.idl b/extensions/webservices/public/nsISOAPFault.idl
index a523db89cca..d8157279b6f 100644
--- a/extensions/webservices/public/nsISOAPFault.idl
+++ b/extensions/webservices/public/nsISOAPFault.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 
 /**
diff --git a/extensions/webservices/public/nsISOAPHeaderBlock.idl b/extensions/webservices/public/nsISOAPHeaderBlock.idl
index 41cb971744b..9058f26bc18 100644
--- a/extensions/webservices/public/nsISOAPHeaderBlock.idl
+++ b/extensions/webservices/public/nsISOAPHeaderBlock.idl
@@ -22,6 +22,10 @@
 
 #include "nsISOAPBlock.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 interface nsIVariant;
 interface nsISOAPEncoding;
diff --git a/extensions/webservices/public/nsISOAPMessage.idl b/extensions/webservices/public/nsISOAPMessage.idl
index a0b4bbc176a..54a76beb85a 100644
--- a/extensions/webservices/public/nsISOAPMessage.idl
+++ b/extensions/webservices/public/nsISOAPMessage.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMDocument;
 interface nsIDOMElement;
 interface nsISOAPEncoding;
diff --git a/extensions/webservices/public/nsISOAPPropertyBagMutator.idl b/extensions/webservices/public/nsISOAPPropertyBagMutator.idl
index 89b985b4d56..b8ffa15666f 100644
--- a/extensions/webservices/public/nsISOAPPropertyBagMutator.idl
+++ b/extensions/webservices/public/nsISOAPPropertyBagMutator.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIPropertyBag;
 interface nsIVariant;
 
diff --git a/extensions/webservices/public/nsISOAPServiceRegistry.idl b/extensions/webservices/public/nsISOAPServiceRegistry.idl
index a7e4ce30676..2be9d983636 100644
--- a/extensions/webservices/public/nsISOAPServiceRegistry.idl
+++ b/extensions/webservices/public/nsISOAPServiceRegistry.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 interface nsISOAPService;
 interface nsISOAPEncodingRegistry;
diff --git a/extensions/xmlextras/soap/public/nsISOAPAttachments.idl b/extensions/xmlextras/soap/public/nsISOAPAttachments.idl
index febc1784b94..b85f9b09e9c 100644
--- a/extensions/xmlextras/soap/public/nsISOAPAttachments.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPAttachments.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 /**
  * This interface permits attachment of SOAP attachments.
  */
diff --git a/extensions/xmlextras/soap/public/nsISOAPBlock.idl b/extensions/xmlextras/soap/public/nsISOAPBlock.idl
index a5722078d0c..7912a138f29 100644
--- a/extensions/xmlextras/soap/public/nsISOAPBlock.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPBlock.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 interface nsIVariant;
 interface nsISOAPEncoding;
diff --git a/extensions/xmlextras/soap/public/nsISOAPCall.idl b/extensions/xmlextras/soap/public/nsISOAPCall.idl
index f74e48ccd12..798d35a49c5 100644
--- a/extensions/xmlextras/soap/public/nsISOAPCall.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPCall.idl
@@ -23,6 +23,10 @@
 #include "nsISupports.idl"
 #include "nsISOAPMessage.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsISOAPResponse;
 interface nsISOAPResponseListener;
 interface nsISOAPCallCompletion;
diff --git a/extensions/xmlextras/soap/public/nsISOAPEncoder.idl b/extensions/xmlextras/soap/public/nsISOAPEncoder.idl
index 977cd0a3405..32c1c478b38 100644
--- a/extensions/xmlextras/soap/public/nsISOAPEncoder.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPEncoder.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsISchemaType;
 interface nsISOAPEncoding;
 interface nsIVariant;
diff --git a/extensions/xmlextras/soap/public/nsISOAPFault.idl b/extensions/xmlextras/soap/public/nsISOAPFault.idl
index a523db89cca..d8157279b6f 100644
--- a/extensions/xmlextras/soap/public/nsISOAPFault.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPFault.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 
 /**
diff --git a/extensions/xmlextras/soap/public/nsISOAPHeaderBlock.idl b/extensions/xmlextras/soap/public/nsISOAPHeaderBlock.idl
index 41cb971744b..9058f26bc18 100644
--- a/extensions/xmlextras/soap/public/nsISOAPHeaderBlock.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPHeaderBlock.idl
@@ -22,6 +22,10 @@
 
 #include "nsISOAPBlock.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 interface nsIVariant;
 interface nsISOAPEncoding;
diff --git a/extensions/xmlextras/soap/public/nsISOAPMessage.idl b/extensions/xmlextras/soap/public/nsISOAPMessage.idl
index a0b4bbc176a..54a76beb85a 100644
--- a/extensions/xmlextras/soap/public/nsISOAPMessage.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPMessage.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMDocument;
 interface nsIDOMElement;
 interface nsISOAPEncoding;
diff --git a/extensions/xmlextras/soap/public/nsISOAPPropertyBagMutator.idl b/extensions/xmlextras/soap/public/nsISOAPPropertyBagMutator.idl
index 89b985b4d56..b8ffa15666f 100644
--- a/extensions/xmlextras/soap/public/nsISOAPPropertyBagMutator.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPPropertyBagMutator.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIPropertyBag;
 interface nsIVariant;
 
diff --git a/extensions/xmlextras/soap/public/nsISOAPServiceRegistry.idl b/extensions/xmlextras/soap/public/nsISOAPServiceRegistry.idl
index a7e4ce30676..2be9d983636 100644
--- a/extensions/xmlextras/soap/public/nsISOAPServiceRegistry.idl
+++ b/extensions/xmlextras/soap/public/nsISOAPServiceRegistry.idl
@@ -22,6 +22,10 @@
 
 #include "nsISupports.idl"
 
+%{ C++
+#include "nsAWritableString.h"
+%} 
+
 interface nsIDOMElement;
 interface nsISOAPService;
 interface nsISOAPEncodingRegistry;