1 files changed, 5 insertions, 0 deletions
diff --git a/src/interpolate.c b/src/interpolate.c
index b719f41..6868f5a 100644
--- a/src/interpolate.c
+++ b/src/interpolate.c
@@ -277,6 +277,11 @@ ReflectionSymmetry_Interpolate (CCTK_POINTER_TO_CONST restrict const cctkGH_,
           ttype = SYMTENSOR;
           tcomponent = vi - firstvar - 4;
         }
+      } else if (CCTK_EQUALS (tensortypealias, "ddd_sym")) {
+        /* 3rd rank tensor, symmetric in last 2 indices */
+        assert (numvars == 18);
+        ttype = SYMTENSOR;
+        tcomponent = (vi - firstvar) % 6;
       } else if (CCTK_EQUALS (tensortypealias, "weylscalars_real")) {
         /* Weyl scalars, stored as 10 real numbers */
         assert (numvars == 10);