diff --git a/programming_runs/utils.py b/programming_runs/utils.py
index 823ea68..d1d1ee0 100644
--- a/programming_runs/utils.py
+++ b/programming_runs/utils.py
@@ -64,9 +64,11 @@ def enumerate_resume(dataset, results_path):
                 continue
             yield i, item
 
+
 def resume_success_count(dataset) -> int:
     count = 0
     for item in dataset:
-        if item["is_solved"]:
+        if "is_solved" in item and item["is_solved"]:
             count += 1
-    return count
\ No newline at end of file
+    return count
+