diff --git a/mozilla/xpcom/io/nsILocalFileMac.h b/mozilla/xpcom/io/nsILocalFileMac.h
index e0bc0ca1dfe..96b31b8aa3b 100644
--- a/mozilla/xpcom/io/nsILocalFileMac.h
+++ b/mozilla/xpcom/io/nsILocalFileMac.h
@@ -98,4 +98,8 @@ public:
 	
 };
 
+
+extern "C" NS_EXPORT nsresult
+NS_NewLocalFileWithFSSpec(FSSpec* inSpec, nsILocalFileMac* *result);
+
 #endif
diff --git a/mozilla/xpcom/io/nsLocalFileMac.cpp b/mozilla/xpcom/io/nsLocalFileMac.cpp
index 51e2155ccfa..056dabe1644 100644
--- a/mozilla/xpcom/io/nsLocalFileMac.cpp
+++ b/mozilla/xpcom/io/nsLocalFileMac.cpp
@@ -2555,3 +2555,19 @@ NS_NewLocalFile(const char* path, nsILocalFile* *result)
 	return NS_OK;
 }
 
+nsresult 
+NS_NewLocalFileWithFSSpec(FSSpec* inSpec, nsILocalFileMac* *result)
+{
+	nsLocalFile* file = new nsLocalFile();
+	if (file == nsnull)
+		return NS_ERROR_OUT_OF_MEMORY;
+	NS_ADDREF(file);
+
+	nsresult rv = file->InitWithFSSpec(inSpec);
+	if (NS_FAILED(rv)) {
+		NS_RELEASE(file);
+		return rv;
+	}
+	*result = file;
+	return NS_OK;
+}