diff --git a/src/libsnore/snore_p.h b/src/libsnore/snore_p.h
index 857a53e..71cea8e 100644
--- a/src/libsnore/snore_p.h
+++ b/src/libsnore/snore_p.h
@@ -42,7 +42,7 @@ public:
      */
     static QString tempPath();
 
-    static constexpr int maxNumberOfActiveNotifications()
+    static Q_CONSTEXPR int maxNumberOfActiveNotifications()
     {
         return 3;
     }