diff --git a/src/qibocal/protocols/characterization/two_qubit_interaction/chsh/utils.py b/src/qibocal/protocols/characterization/two_qubit_interaction/chsh/utils.py
index fea6225d1..d18fc97d7 100644
--- a/src/qibocal/protocols/characterization/two_qubit_interaction/chsh/utils.py
+++ b/src/qibocal/protocols/characterization/two_qubit_interaction/chsh/utils.py
@@ -17,4 +17,7 @@ def compute_chsh(frequencies, basis, i):
                 chsh += (-1) ** (int(outcome[0]) + int(outcome[1])) * freq[outcome][i]
         aux += 1
     nshots = sum(freq[x][i] for x in freq)
-    return chsh / nshots
+    try:
+        return chsh / nshots
+    except ZeroDivisionError:
+        return 0