diff --git a/android/app/src/main/java/com/microsoft/codepush/react/FileUtils.java b/android/app/src/main/java/com/microsoft/codepush/react/FileUtils.java
index babed5ea2..45de5b744 100644
--- a/android/app/src/main/java/com/microsoft/codepush/react/FileUtils.java
+++ b/android/app/src/main/java/com/microsoft/codepush/react/FileUtils.java
@@ -124,7 +124,7 @@ public static String readFileToString(String filePath) throws IOException {
     }
 
     private static String validateFileName(String fileName, File destinationFolder) throws IOException {
-        String destinationFolderCanonicalPath = destinationFolder.getCanonicalPath();
+        String destinationFolderCanonicalPath = destinationFolder.getCanonicalPath() + File.separator;
 
         File file = new File(destinationFolderCanonicalPath, fileName);
         String canonicalPath = file.getCanonicalPath();