diff --git a/utils/TableGen/DFAPacketizerEmitter.cpp b/utils/TableGen/DFAPacketizerEmitter.cpp
index 1a5af84c6e0..d97297f63d1 100644
--- a/utils/TableGen/DFAPacketizerEmitter.cpp
+++ b/utils/TableGen/DFAPacketizerEmitter.cpp
@@ -290,6 +290,7 @@ void DFA::addTransition(Transition *T) {
   // Add the new transition.
   bool Added = stateTransitions[T->from].insert(T).second;
   assert(Added && "Cannot have multiple states for the same input");
+  (void)Added;
 }