diff --git a/lib/tfw/fsm_base.py b/lib/tfw/fsm_base.py
index 28b5ef6..2de2b43 100644
--- a/lib/tfw/fsm_base.py
+++ b/lib/tfw/fsm_base.py
@@ -24,6 +24,7 @@ class FSMBase(Machine, CallbackMixin):
     def __init__(self, initial=None, accepted_states=None):
         self.accepted_states = accepted_states or [self.states[-1]]
         self.trigger_predicates = defaultdict(list)
+        self.trigger_history = []
 
         Machine.__init__(
             self,
@@ -61,5 +62,6 @@ class FSMBase(Machine, CallbackMixin):
         if all(predicate_results):
             try:
                 self.trigger(trigger)
+                self.trigger_history.append(trigger)
             except (AttributeError, MachineError):
                 LOG.debug('FSM failed to execute nonexistent trigger: "%s"', trigger)