diff --git a/lib/cuckoo/core/reporting/schema.py b/lib/cuckoo/core/reporting/schema.py
index 7dd4c9fd9d7..3c43df02e7d 100644
--- a/lib/cuckoo/core/reporting/schema.py
+++ b/lib/cuckoo/core/reporting/schema.py
@@ -109,7 +109,7 @@ class Argument(BaseModel):
     repeated: int = 0
 
 class Calls(BaseModel):
-    calls_: list[Call] = []
+    calls: list[Call] = []
     pid: int
 
 class ProcMemory(BaseModel):