diff --git a/src/robots/default_robot.hpp b/src/robots/default_robot.hpp
index 569153382..e74dcaf5c 100644
--- a/src/robots/default_robot.hpp
+++ b/src/robots/default_robot.hpp
@@ -28,7 +28,14 @@
 class Track;
 class LinearWorld;
 class QuadGraph;
-class irr::scene::ISceneNode;
+
+namespace irr
+{
+    namespace scene
+    {
+        class ISceneNode;
+    }
+}
 
 class DefaultRobot : public AutoKart
 {
diff --git a/src/robots/new_ai.hpp b/src/robots/new_ai.hpp
index 70f87201a..401ff66e7 100644
--- a/src/robots/new_ai.hpp
+++ b/src/robots/new_ai.hpp
@@ -27,7 +27,13 @@
 class Track;
 class LinearWorld;
 class QuadGraph;
-class irr::scene::ISceneNode;
+namespace irr
+{
+    namespace scene
+    {
+        class ISceneNode;
+    }
+}
 
 class NewAI : public AutoKart
 {