1 files changed, 4 insertions, 0 deletions
diff --git a/param.ccl b/param.ccl
index 6de1f76..d4d9db7 100644
--- a/param.ccl
+++ b/param.ccl
@@ -43,6 +43,10 @@ INT ghost_size "The width of the ghost zone in each direction"
     -1:*     :: "Must be a positive integer"
 } -1
 
+BOOLEAN periodic "Periodic boundary conditions"
+{
+} "no"
+
 private:
 
 INT local_nx "The size of the grid in the x direction"