diff --git a/python/dolma/core/binning.py b/python/dolma/core/binning.py
index 3afee92f..9722ffd9 100644
--- a/python/dolma/core/binning.py
+++ b/python/dolma/core/binning.py
@@ -232,7 +232,7 @@ def add(self, values: Union[List[Union[int, float]], Union[int, float]], counts:
 
         for value, count in zip(values, counts):
             self._add(value, count)
-            self._total += 1
+            self._total += count
             self._sum += value * count
 
     def add_summary(self, summary: SummaryTuple):