diff --git a/sdlpp/sdlpp_collision.hpp b/sdlpp/sdlpp_collision.hpp
index e78e5ce..375d693 100644
--- a/sdlpp/sdlpp_collision.hpp
+++ b/sdlpp/sdlpp_collision.hpp
@@ -3,6 +3,7 @@
 
 #include "sdlpp_common.hpp"
 #include "sdlpp_renderer.hpp"
+#include <memory>
 
 namespace SDLPP {
 class SDLPPSCOPE CollisionPolygon {