diff --git a/tutorials/11-texture-region-repeat/inc/tutorial_11.hpp b/tutorials/11-texture-region-repeat/inc/tutorial_11.hpp
index d63c0bd..0e8879d 100644
--- a/tutorials/11-texture-region-repeat/inc/tutorial_11.hpp
+++ b/tutorials/11-texture-region-repeat/inc/tutorial_11.hpp
@@ -17,7 +17,7 @@ namespace Tyra {
 
 class Tutorial11 : public Game {
  public:
-  Tutorial11(Engine* engine);
+  explicit Tutorial11(Engine* engine);
   ~Tutorial11();
 
   void init();