diff --git a/pysnooper/tracer.py b/pysnooper/tracer.py
index 37baf56..30e8f85 100644
--- a/pysnooper/tracer.py
+++ b/pysnooper/tracer.py
@@ -198,7 +198,7 @@ class Tracer:
              v if isinstance(v, BaseVariable) else Exploding(v)
              for v in utils.ensure_tuple(watch_explode)
         ]
-        self.frame_to_local_reprs = collections.OrderedDict()
+        self.frame_to_local_reprs = {}
         self.depth = depth
         self.prefix = prefix
         self.overwrite = overwrite