X-Git-Url: http://mmka.chem.univ.gda.pl/gitweb/?a=blobdiff_plain;f=source%2Funres%2Fsrc_CSA%2Farcos.f;h=f054118a1022be3f84f9a3a80bc64c15caebfbc7;hb=34b56f82298df0d9781948908b2d93415838d88e;hp=69810ea0c66bb1053bc43099918f93b61f7a4639;hpb=6faa406438bff5968dc4a386929745cfaf554352;p=unres.git

diff --git a/source/unres/src_CSA/arcos.f b/source/unres/src_CSA/arcos.f
index 69810ea..f054118 100644
--- a/source/unres/src_CSA/arcos.f
+++ b/source/unres/src_CSA/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=PIPOL*(1.0d0-DSIGN(1.0D0,X))
       RETURN
     1 ARCOS=DACOS(X)
       RETURN