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-rw-r--r--src/classifiers/bayes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/classifiers/bayes.c b/src/classifiers/bayes.c
index ae291de24..554fc777c 100644
--- a/src/classifiers/bayes.c
+++ b/src/classifiers/bayes.c
@@ -124,7 +124,7 @@ inv_chi_square (gdouble value, gint freedom_deg)
#ifdef HAVE_EXPL
prob = expl (-value);
#elif defined(HAVE_EXP2L)
- prob = exp2l (-value);
+ prob = exp2l (-value * log2 (M_E));
#else
prob = exp (-value);
#endif