diff --git a/apps/openmw/mwrender/sky.cpp b/apps/openmw/mwrender/sky.cpp
index 32d32a40c0..b58b319063 100644
--- a/apps/openmw/mwrender/sky.cpp
+++ b/apps/openmw/mwrender/sky.cpp
@@ -18,6 +18,7 @@
 #include <osg/PolygonOffset>
 #include <osg/observer_ptr>
 
+#include <osgParticle/BoxPlacer>
 #include <osgParticle/ModularEmitter>
 #include <osgParticle/ParticleSystem>
 #include <osgParticle/ParticleSystemUpdater>
diff --git a/apps/openmw/mwrender/sky.hpp b/apps/openmw/mwrender/sky.hpp
index 990cd9b4fa..9727529d97 100644
--- a/apps/openmw/mwrender/sky.hpp
+++ b/apps/openmw/mwrender/sky.hpp
@@ -9,8 +9,6 @@
 #include <osg/Vec4f>
 #include <osg/Uniform>
 
-#include <osgParticle/BoxPlacer>
-
 namespace osg
 {
     class Camera;
@@ -27,6 +25,7 @@ namespace osg
 namespace osgParticle
 {
     class ParticleSystem;
+    class BoxPlacer;
 }
 
 namespace Resource