diff --git a/qstrader/simulation/sim_engine.py b/qstrader/simulation/sim_engine.py
index 8f7eb895..e843c3d1 100644
--- a/qstrader/simulation/sim_engine.py
+++ b/qstrader/simulation/sim_engine.py
@@ -3,7 +3,7 @@
 
 class SimulationEngine(object):
     """
-    Interface to a tradinh event simulation engine.
+    Interface to a trading event simulation engine.
 
     Subclasses are designed to take starting and ending
     timestamps to generate events at a specific frequency.