diff --git a/Carpet/Carpet/param.ccl b/Carpet/Carpet/param.ccl
index d4887ce..e9fa540 100644
--- a/Carpet/Carpet/param.ccl
+++ b/Carpet/Carpet/param.ccl
@@ -450,6 +450,7 @@ CCTK_INT min_points_per_proc "Minimum number of grid points per processor" STEER
 
 CCTK_INT num_threads "Number of threads per process" STEERABLE=recover
 {
+  -2  :: "use one thread of OMP_NUM_THREADS is not set; otherwise, use the system devault"
   -1  :: "use system default, probably influenced by OMP_NUM_THREADS"
   1:* :: "use this many threads"
 } -1
diff --git a/Carpet/Carpet/src/Recompose.cc b/Carpet/Carpet/src/Recompose.cc
index eb2fb46..a02d747 100644
--- a/Carpet/Carpet/src/Recompose.cc
+++ b/Carpet/Carpet/src/Recompose.cc
@@ -838,7 +838,7 @@ namespace Carpet {
     
     // Output
     CCTK_VInfo (CCTK_THORNSTRING,
-                "Grid structure statistics:");
+                "Global grid structure statistics:");
     CCTK_VInfo (CCTK_THORNSTRING,
                 "GF: rhs: %.0fk active, %.0fk owned (+%.0f%%), %.0fk total (+%.0f%%), %.3g steps/time",
                 double (num_active_cpu_points / 1000),