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-rw-r--r--src/likelihood.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/likelihood.h b/src/likelihood.h
index d739802..304fd70 100644
--- a/src/likelihood.h
+++ b/src/likelihood.h
@@ -22,6 +22,8 @@
#include <gsl/gsl_interp.h>
#include <gsl/gsl_spline.h>
+#define EPSILON 1e-10
+
#define PSUP_REFLECTION_TIME 80.0
/* Minimum number of points in the track integral. */