X-Git-Url: http://mmka.chem.univ.gda.pl/gitweb/?a=blobdiff_plain;f=source%2Fcluster%2Fwham%2Fsrc%2Farcos.f;h=698f704a2e08d2955db2ee3e4da3e12284078b8a;hb=f4fee4f336542f1e52bca12b8d97c42f60156b5d;hp=052a1e4b541287f30debba0e0051fa92b63b3267;hpb=478a9d9a1c99eb3f4bc4ca676ff3162bdd01d633;p=unres.git

diff --git a/source/cluster/wham/src/arcos.f b/source/cluster/wham/src/arcos.f
index 052a1e4..698f704 100644
--- a/source/cluster/wham/src/arcos.f
+++ b/source/cluster/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(X,1.0D0)*PI)
+      ARCOS=0.5D0*(PI-DSIGN(X,1.0D0)*PI)
       RETURN
     1 ARCOS=DACOS(X)
       RETURN