X-Git-Url: http://mmka.chem.univ.gda.pl/gitweb/?a=blobdiff_plain;f=source%2Fwham%2Fsrc%2Farcos.f;h=afc6724defe02b89ca7c9abd89f7f03d34618e45;hb=3f27a1a456bcd7b4e99d88f74c8d255445af50a1;hp=69810ea0c66bb1053bc43099918f93b61f7a4639;hpb=a45ce81aae2c857c30b821e39e45a7a08356de4d;p=unres.git

diff --git a/source/wham/src/arcos.f b/source/wham/src/arcos.f
index 69810ea..afc6724 100644
--- a/source/wham/src/arcos.f
+++ b/source/wham/src/arcos.f
@@ -2,7 +2,7 @@
       implicit real*8 (a-h,o-z)
       include 'COMMON.GEO'
       IF (DABS(X).LT.1.0D0) GOTO 1
-      ARCOS=0.5D0*(PI+DSIGN(1.0D0,X)*PI)
+      ARCOS=0.5D0*(PI-DSIGN(1.0D0,X)*PI)
       RETURN
     1 ARCOS=DACOS(X)
       RETURN