1 files changed, 1 insertions, 0 deletions
diff --git a/interface.ccl b/interface.ccl
index 2d4a698..d92c26a 100644
--- a/interface.ccl
+++ b/interface.ccl
@@ -3,6 +3,7 @@
 
 implements: ADMBase
 inherits: grid
+USES INCLUDE HEADER: Symmetry.h
 
 public: