diff --git a/Grid/threads/Accelerator.cc b/Grid/threads/Accelerator.cc
index 864d90a9..f6df4a31 100644
--- a/Grid/threads/Accelerator.cc
+++ b/Grid/threads/Accelerator.cc
@@ -21,22 +21,26 @@ void acceleratorInit(void)
 #define ENV_RANK_SLURM         "SLURM_PROCID"
 #define ENV_LOCAL_RANK_MVAPICH "MV2_COMM_WORLD_LOCAL_RANK"
 #define ENV_RANK_MVAPICH       "MV2_COMM_WORLD_RANK"
-  // We extract the local rank initialization using an environment variable
-  if ((localRankStr = getenv(ENV_LOCAL_RANK_OMPI)) != NULL) {
-    printf("OPENMPI detected\n");
-    rank = atoi(localRankStr);		
-  } else if ((localRankStr = getenv(ENV_LOCAL_RANK_MVAPICH)) != NULL) {
-    printf("MVAPICH detected\n");
-    rank = atoi(localRankStr);		
-  } else if ((localRankStr = getenv(ENV_LOCAL_RANK_SLURM)) != NULL) {
-    printf("SLURM detected\n");
-    rank = atoi(localRankStr);		
-  } else { 
-    printf("MPI version is unknown - bad things may happen\n");
-  }
   if ((localRankStr = getenv(ENV_RANK_OMPI   )) != NULL) { world_rank = atoi(localRankStr);}
   if ((localRankStr = getenv(ENV_RANK_MVAPICH)) != NULL) { world_rank = atoi(localRankStr);}
   if ((localRankStr = getenv(ENV_RANK_SLURM  )) != NULL) { world_rank = atoi(localRankStr);}
+  // We extract the local rank initialization using an environment variable
+  if ((localRankStr = getenv(ENV_LOCAL_RANK_OMPI)) != NULL) {
+    if (!world_rank)
+      printf("OPENMPI detected\n");
+    rank = atoi(localRankStr);		
+  } else if ((localRankStr = getenv(ENV_LOCAL_RANK_MVAPICH)) != NULL) {
+    if (!world_rank)
+      printf("MVAPICH detected\n");
+    rank = atoi(localRankStr);		
+  } else if ((localRankStr = getenv(ENV_LOCAL_RANK_SLURM)) != NULL) {
+    if (!world_rank)
+      printf("SLURM detected\n");
+    rank = atoi(localRankStr);		
+  } else { 
+    if (!world_rank)
+      printf("MPI version is unknown - bad things may happen\n");
+  }
 
   size_t totalDeviceMem=0;
   for (int i = 0; i < nDevices; i++) {