diff --git a/netwerk/base/nsIStandardURL.idl b/netwerk/base/nsIStandardURL.idl
index eef5a6fb5088..633d184abc39 100644
--- a/netwerk/base/nsIStandardURL.idl
+++ b/netwerk/base/nsIStandardURL.idl
@@ -40,14 +40,6 @@ interface nsIStandardURL : nsIMutable
      * blah:///foo/bar => blah:///foo/bar
      */
     const unsigned long URLTYPE_NO_AUTHORITY    = 3;
-
-    void init(in unsigned long aUrlType,
-              in long aDefaultPort,
-              in AUTF8String aSpec,
-              in string aOriginCharset,
-              in nsIURI aBaseURI);
-
-    void setDefaultPort(in long aNewDefaultPort);
 };
 
 [scriptable, builtinclass, uuid(fc894e98-23a1-43cd-a7fe-72876f8ea2ee)]
diff --git a/netwerk/base/nsStandardURL.cpp b/netwerk/base/nsStandardURL.cpp
index ce0d9a897d53..d1b5cb1d28f7 100644
--- a/netwerk/base/nsStandardURL.cpp
+++ b/netwerk/base/nsStandardURL.cpp
@@ -3298,7 +3298,7 @@ nsStandardURL::SetFile(nsIFile *file)
 // nsStandardURL::nsIStandardURL
 //----------------------------------------------------------------------------
 
-NS_IMETHODIMP
+nsresult
 nsStandardURL::Init(uint32_t urlType,
                     int32_t defaultPort,
                     const nsACString &spec,
@@ -3355,7 +3355,7 @@ nsStandardURL::Init(uint32_t urlType,
     return SetSpecWithEncoding(buf, encoding);
 }
 
-NS_IMETHODIMP
+nsresult
 nsStandardURL::SetDefaultPort(int32_t aNewDefaultPort)
 {
     ENSURE_MUTABLE();
diff --git a/netwerk/base/nsStandardURL.h b/netwerk/base/nsStandardURL.h
index 54b37d9b1590..a66848a95bac 100644
--- a/netwerk/base/nsStandardURL.h
+++ b/netwerk/base/nsStandardURL.h
@@ -181,6 +181,10 @@ protected:
     virtual nsresult EnsureFile();
 
 private:
+    nsresult Init(uint32_t urlType, int32_t defaultPort, const nsACString &spec,
+                  const char *charset, nsIURI *baseURI);
+    nsresult SetDefaultPort(int32_t aNewDefaultPort);
+
     int32_t  Port() { return mPort == -1 ? mDefaultPort : mPort; }
 
     void     ReplacePortInSpec(int32_t aNewPort);