1 files changed, 1 insertions, 1 deletions
diff --git a/src/likelihood.c b/src/likelihood.c
index 8b91f65..ccdfc84 100644
--- a/src/likelihood.c
+++ b/src/likelihood.c
@@ -537,7 +537,7 @@ double nll_muon(event *ev, double T0, double *pos, double *dir, double t0, doubl
 
     logp_path = 0.0;
     for (i = 0; i < n; i++)
-        logp_path += pow(z1[i],2) + pow(z2[i],2);
+        logp_path += log(norm(z1[i],0,1)) + log(norm(z2[i],0,1));
 
     return kahan_sum(nll,nhit) + logp_path;
 }