1 files changed, 1 insertions, 1 deletions
diff --git a/src/muon.c b/src/muon.c
index 14574d3..6841441 100644
--- a/src/muon.c
+++ b/src/muon.c
@@ -121,7 +121,7 @@ void muon_get_position_distribution_parameters(double T0, double *a, double *b)
      * See http://pdg.lbl.gov/2014/reviews/rpp2014-rev-passage-particles-matter.pdf.
      *
      * FIXME: Double check that this is correct for muons. */
-    *b = -7.8 + 0.118928*T0;
+    *b = fmax(20.0,-7.8 + 0.118928*T0);
     *a = 1.5;
 }