1 files changed, 1 insertions, 1 deletions
diff --git a/src/corelib/statemachine/qstatemachine.h b/src/corelib/statemachine/qstatemachine.h
index c9c60976d1..b3aeb41016 100644
--- a/src/corelib/statemachine/qstatemachine.h
+++ b/src/corelib/statemachine/qstatemachine.h
@@ -119,7 +119,7 @@ public:
         NoCommonAncestorForTransitionError
     };
 
-    QStateMachine(QObject *parent = 0);
+    explicit QStateMachine(QObject *parent = 0);
     ~QStateMachine();
 
     void addState(QAbstractState *state);