1 files changed, 6 insertions, 6 deletions
diff --git a/Carpet/Carpet/src/helpers.cc b/Carpet/Carpet/src/helpers.cc
index a5140f7f9..88691e86f 100644
--- a/Carpet/Carpet/src/helpers.cc
+++ b/Carpet/Carpet/src/helpers.cc
@@ -49,18 +49,18 @@ namespace Carpet {
 
 
   // Multi-Model
-  CCTK_INT
+  CCTK_POINTER_TO_CONST
   Carpet_GetMPICommUniverse (CCTK_POINTER_TO_CONST const cctkGH)
   {
-    assert (comm_universe >= 0);
-    return comm_universe;
+    assert (comm_universe != MPI_COMM_NULL);
+    return & comm_universe;
   }
 
-  CCTK_INT
+  CCTK_POINTER_TO_CONST
   Carpet_GetMPICommWorld (CCTK_POINTER_TO_CONST const cctkGH)
   {
-    assert (comm_world >= 0);
-    return comm_world;
+    assert (comm_world != MPI_COMM_NULL);
+    return & comm_world;
   }