diff --git a/report.py b/report.py
index 51049ca..b707b52 100644
--- a/report.py
+++ b/report.py
@@ -102,8 +102,11 @@
         scale_x = []
         for build_id, build_results in value.items():
             legend.append(build_id)
-            ordered_build_results = OrderedDict(sorted(build_results.items(),
-                                                key=lambda t: ssize_to_kb(t[0])))
+
+            OD = OrderedDict
+            ordered_build_results = OD(sorted(build_results.items(),
+                                       key=lambda t: ssize_to_kb(t[0])))
+
             if not scale_x:
                 scale_x = ordered_build_results.keys()
             dataset.append(zip(*ordered_build_results.values())[0])
@@ -141,4 +144,4 @@
 
 
 if __name__ == '__main__':
-    exit(main(sys.argv[1:]))
\ No newline at end of file
+    exit(main(sys.argv[1:]))