diff --git a/netwerk/protocol/ftp/src/nsFtpConnectionThread.cpp b/netwerk/protocol/ftp/src/nsFtpConnectionThread.cpp
index ff55772a0a5..a0565dd3433 100644
--- a/netwerk/protocol/ftp/src/nsFtpConnectionThread.cpp
+++ b/netwerk/protocol/ftp/src/nsFtpConnectionThread.cpp
@@ -77,6 +77,28 @@ nsFtpConnectionThread::~nsFtpConnectionThread() {
 }
 
 
+////////////////////////////////////////////////////////////////////////////////
+// nsICancelable methods:
+
+NS_IMETHODIMP
+nsFtpConnectionThread::Cancel(void) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsFtpConnectionThread::Suspend(void) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsFtpConnectionThread::Resume(void) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIRunnable method:
+
 // main event loop
 NS_IMETHODIMP
 nsFtpConnectionThread::Run() {
diff --git a/netwerk/protocol/ftp/src/nsFtpConnectionThread.h b/netwerk/protocol/ftp/src/nsFtpConnectionThread.h
index 1f0099f57e7..99fd21c004d 100644
--- a/netwerk/protocol/ftp/src/nsFtpConnectionThread.h
+++ b/netwerk/protocol/ftp/src/nsFtpConnectionThread.h
@@ -106,7 +106,7 @@ typedef enum _FTP_ACTION {
 	DEL
 } FTP_ACTION;
 
-class nsFtpConnectionThread : public nsIRunnable {
+class nsFtpConnectionThread : public nsIRunnable, nsICancelable {
 public:
     NS_DECL_ISUPPORTS
 
@@ -116,6 +116,11 @@ public:
 	// nsIRunnable method
 	NS_IMETHOD Run();
 
+    // nsICancelable methods:
+    NS_IMETHOD Cancel(void);
+    NS_IMETHOD Suspend(void);
+    NS_IMETHOD Resume(void);
+
     nsresult Init(nsIThread* aThread,
                   nsIUrl* aUrl);