diff --git a/xpcom/io/nsLocalFileUnix.cpp b/xpcom/io/nsLocalFileUnix.cpp
index 416fca451d6..57cef5438eb 100644
--- a/xpcom/io/nsLocalFileUnix.cpp
+++ b/xpcom/io/nsLocalFileUnix.cpp
@@ -334,7 +334,7 @@ nsLocalFile::Clone(nsIFile **file)
 NS_IMETHODIMP
 nsLocalFile::InitWithNativePath(const nsACString &filePath)
 {
-    if (Substring(filePath, 0, 2).EqualsLiteral("~/")) {
+    if (filePath.Equals("~") || Substring(filePath, 0, 2).EqualsLiteral("~/")) {
         nsCOMPtr<nsIFile> homeDir;
         nsCAutoString homePath;
         if (NS_FAILED(NS_GetSpecialDirectory(NS_OS_HOME_DIR,
@@ -342,8 +342,10 @@ nsLocalFile::InitWithNativePath(const nsACString &filePath)
             NS_FAILED(homeDir->GetNativePath(homePath))) {
             return NS_ERROR_FAILURE;
         }
-        
-        mPath = homePath + Substring(filePath, 1, filePath.Length() - 1);
+ 
+        mPath = homePath;
+        if (filePath.Length() > 2)
+          mPath.Append(Substring(filePath, 1, filePath.Length() - 1));
     } else {
         if (filePath.IsEmpty() || filePath.First() != '/')
             return NS_ERROR_FILE_UNRECOGNIZED_PATH;
diff --git a/xpcom/tests/unit/test_bug745466.js b/xpcom/tests/unit/test_bug745466.js
new file mode 100644
index 00000000000..22a911ac524
--- /dev/null
+++ b/xpcom/tests/unit/test_bug745466.js
@@ -0,0 +1,6 @@
+Components.utils.import("resource://gre/modules/FileUtils.jsm");
+
+function run_test()
+{
+  do_check_true(FileUtils.File("~").equals(FileUtils.getDir("Home", [])));
+}
diff --git a/xpcom/tests/unit/xpcshell.ini b/xpcom/tests/unit/xpcshell.ini
index 785e86fb4e2..e173c7d1586 100644
--- a/xpcom/tests/unit/xpcshell.ini
+++ b/xpcom/tests/unit/xpcshell.ini
@@ -45,3 +45,4 @@ fail-if = os == "android"
 [test_versioncomparator.js]
 [test_comp_no_aslr.js]
 fail-if = os != "win"
+[test_bug745466.js]