1 files changed, 12 insertions, 0 deletions
diff --git a/src/Register.c b/src/Register.c
index 0bd0252..409ab34 100644
--- a/src/Register.c
+++ b/src/Register.c
@@ -86,6 +86,18 @@ void Boundary_RegisterBCs(CCTK_ARGUMENTS) {
     }
   }
 
+  if (register_flat)
+  {
+    err = Boundary_RegisterPhysicalBC(cctkGH, (CCTK_FPOINTER) &BndFlat, 
+				      "Flat");
+    if (err)
+    {
+      CCTK_VWarn(1, __LINE__, __FILE__, CCTK_THORNSTRING,
+		 "Error %d when registering routine to handle \"Flat\" "
+		 "boundary condition", err);
+    }
+  }
+
   if (register_radiation)
   {
     err = Boundary_RegisterPhysicalBC(cctkGH, (CCTK_FPOINTER) &BndRadiative,