diff --git a/moto/dynamodb2/models.py b/moto/dynamodb2/models.py
index 4dcb367e8..ba4bbaf6f 100644
--- a/moto/dynamodb2/models.py
+++ b/moto/dynamodb2/models.py
@@ -369,7 +369,7 @@ class Table(object):
         if scan_index_forward is False:
             results.reverse()
 
-        scanned_count = len(self.all_items())
+        scanned_count = len(list(self.all_items()))
 
         results, last_evaluated_key = self._trim_results(results, limit,
                                                          exclusive_start_key)