diff --git a/scripts/live_triggermap.py b/scripts/live_triggermap.py
index 7adaac2326284a77681c0ccd822950b7ca0b5c47..35a7e6318fdeb92d6c864d252767e48611b41712 100755
--- a/scripts/live_triggermap.py
+++ b/scripts/live_triggermap.py
@@ -77,7 +77,7 @@ class DOMHits(Module):
             hits = np.zeros(self.det.n_doms * self.det.n_dus)
             for dom_id in event_hits.dom_id:
                 du, floor, _ = self.det.doms[dom_id]
-                hits[(du - 1) * self.detecotor.n_doms + floor - 1] += 1
+                hits[(du - 1) * self.det.n_doms + floor - 1] += 1
             self.hits.append(hits)
             triggered_hits = np.zeros(self.det.n_doms * self.det.n_dus)
             for dom_id in event_hits.dom_id[event_hits.triggered.astype(