diff --git a/setup.py b/setup.py
index b9ecc580eb..6a86f0f97a 100644
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,9 @@ install_requires = [
     "Qt",
     "speedcopy",
     "googleapiclient",
-    "httplib2"
+    "httplib2",
+    # Harmony implementation
+    "filecmp"
 ]
 
 includes = []