diff --git a/src/ragas/metrics/_factual_correctness.py b/src/ragas/metrics/_factual_correctness.py
index 0a88ae683..0d1f406ad 100644
--- a/src/ragas/metrics/_factual_correctness.py
+++ b/src/ragas/metrics/_factual_correctness.py
@@ -257,10 +257,10 @@ async def _single_turn_ascore(
         else:
             response_reference = np.array([])
 
+        response_reference = np.array(response_reference, dtype=bool)
         tp = sum(reference_response)
         fp = sum(~reference_response)
         if self.mode != "precision":
-            response_reference = np.array(response_reference, dtype=bool)
             fn = sum(~response_reference)
         else:
             fn = 0