diff --git a/devito/ir/iet/nodes.py b/devito/ir/iet/nodes.py
index 3596af2e82..6ee65bbc47 100644
--- a/devito/ir/iet/nodes.py
+++ b/devito/ir/iet/nodes.py
@@ -32,6 +32,7 @@
 
 # First-class IET nodes
 
+
 class Node(Signer):
 
     __metaclass__ = abc.ABCMeta