diff --git a/fsl/wrappers/cluster_commands.py b/fsl/wrappers/cluster_commands.py
index c3b28e96f1f91cd0b5c519afb6ac02505bcce7c0..8cf8fba5beb889a4a45147724fc583589f19b7e4 100644
--- a/fsl/wrappers/cluster_commands.py
+++ b/fsl/wrappers/cluster_commands.py
@@ -88,6 +88,10 @@ def smoothest(inimg=None, **kwargs):
             'FWHMmm'    : [3.15631, 3.28437, 2.85206]
         }
     """
+
+    # Suppress stdout unless otherwise instructed
+    kwargs['log'] = kwargs.get('log', {'tee' : False})
+
     result = _smoothest(**kwargs)
     result = result.stdout[0]
     result = result.strip().split('\n')[-5:]