[Minor] Fix formula

1 files changed, 8 insertions, 8 deletions

diff --git a/src/libstat/classifiers/bayes.c b/src/libstat/classifiers/bayes.c
index 2e710522b..5295e018b 100644
--- a/src/libstat/classifiers/bayes.c
+++ b/src/libstat/classifiers/bayes.c
@@ -344,22 +344,22 @@ bayes_classify (struct rspamd_classifier * ctx,
 		return TRUE;
 	}
 
-	if (cl.spam_prob < -300 && cl.ham_prob < -300) {
+	if (cl.spam_prob > -300 && cl.ham_prob > -300) {
 		/* Fisher value is low enough to apply inv_chi_square */
 		h = 1 - inv_chi_square (task, cl.spam_prob, cl.processed_tokens);
 		s = 1 - inv_chi_square (task, cl.ham_prob, cl.processed_tokens);
 	}
 	else {
 		/* Use naive method */
-		if (cl.spam_prob > cl.ham_prob) {
-			s = (1.0 - exp(cl.spam_prob / cl.ham_prob)) /
-					(1.0 + exp(cl.spam_prob / cl.ham_prob));
-			h = 1.0 - s;
+		if (cl.spam_prob < cl.ham_prob) {
+			h = (1.0 - exp(cl.spam_prob - cl.ham_prob)) /
+					(1.0 + exp(cl.spam_prob - cl.ham_prob));
+			s = 1.0 - h;
 		}
 		else {
-			h = (1.0 - exp(cl.ham_prob / cl.spam_prob)) /
-				(1.0 + exp(cl.ham_prob / cl.spam_prob));
-			s = 1.0 - h;
+			s = (1.0 - exp(cl.ham_prob - cl.spam_prob)) /
+				(1.0 + exp(cl.ham_prob - cl.spam_prob));
+			h = 1.0 - s;
 		}
 	}