diff --git a/ClusterWrap/__init__.py b/ClusterWrap/__init__.py
index adcedde..3744cea 100644
--- a/ClusterWrap/__init__.py
+++ b/ClusterWrap/__init__.py
@@ -5,7 +5,7 @@
 cluster = local_cluster
 
 if which('bsub') is not None:
-    if os.system('bsub -V') != 32512:
-        cluster = janelia_lsf_cluster
-
-
+    test_version = os.system('bsub -V > /dev/null 2>&1')
+    # Check if version call was succesful (32512: fail, 512: Unknown option).
+    if (test_version != 32512) | (test_version != 512):
+        cluster = janelia_lsf_cluster
\ No newline at end of file