diff --git a/Engine/source/gfx/D3D9/videoCaptureD3D9.h b/Engine/source/gfx/D3D9/videoCaptureD3D9.h
index f9c5e9f1d..eb3b7e19f 100644
--- a/Engine/source/gfx/D3D9/videoCaptureD3D9.h
+++ b/Engine/source/gfx/D3D9/videoCaptureD3D9.h
@@ -20,6 +20,9 @@
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
 
+#ifndef _GFX_D3D_VIDEOCAPTURED3D9_H_
+#define _GFX_D3D_VIDEOCAPTURED3D9_H_
+
 #ifndef _VIDEOCAPTURE_H_
 #include "gfx/video/videoCapture.h"
 #endif
@@ -79,4 +82,6 @@ protected:
 public:
    VideoFrameGrabberD3D9();
    ~VideoFrameGrabberD3D9();
-};
\ No newline at end of file
+};
+
+#endif // _GFX_D3D_VIDEOCAPTURED3D9_H_
diff --git a/Engine/source/math/mPolyhedron.impl.h b/Engine/source/math/mPolyhedron.impl.h
index b36debcaa..ef74995ab 100644
--- a/Engine/source/math/mPolyhedron.impl.h
+++ b/Engine/source/math/mPolyhedron.impl.h
@@ -20,6 +20,9 @@
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
 
+#ifndef _MPOLYHEDRON_IMPL_H_
+#define _MPOLYHEDRON_IMPL_H_
+
 #include "math/mPlaneTransformer.h"
 
 
@@ -503,3 +506,5 @@ void PolyhedronData::buildBoxData( Polyhedron& poly, const MatrixF& mat, const B
       edge ++;
    }
 }
+
+#endif // _MPOLYHEDRON_IMPL_H_
diff --git a/Engine/source/scene/mixin/sceneAmbientSoundObject.impl.h b/Engine/source/scene/mixin/sceneAmbientSoundObject.impl.h
index b975a2d41..8953ac73c 100644
--- a/Engine/source/scene/mixin/sceneAmbientSoundObject.impl.h
+++ b/Engine/source/scene/mixin/sceneAmbientSoundObject.impl.h
@@ -20,6 +20,9 @@
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
 
+#ifndef _SCENEAMBIENTSOUNDOBJECT_IMPL_H_
+#define _SCENEAMBIENTSOUNDOBJECT_IMPL_H_
+
 #include "platform/platform.h"
 #include "scene/mixin/sceneAmbientSoundObject.h"
 
@@ -112,3 +115,5 @@ bool SceneAmbientSoundObject< Base >::_setSoundAmbience( void* object, const cha
    p->setSoundAmbience( ambience );
    return false;
 }
+
+#endif // _SCENEAMBIENTSOUNDOBJECT_IMPL_H_
diff --git a/Engine/source/scene/mixin/scenePolyhedralObject.impl.h b/Engine/source/scene/mixin/scenePolyhedralObject.impl.h
index 43a1e3e9f..b01eb9691 100644
--- a/Engine/source/scene/mixin/scenePolyhedralObject.impl.h
+++ b/Engine/source/scene/mixin/scenePolyhedralObject.impl.h
@@ -19,6 +19,8 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
+#ifndef _SCENEPOLYHEDRALOBJECT_IMPL_H_
+#define _SCENEPOLYHEDRALOBJECT_IMPL_H_
 
 #include "platform/platform.h"
 #include "scene/mixin/scenePolyhedralObject.h"
@@ -393,3 +395,5 @@ bool ScenePolyhedralObject< Base, P >::_setEdge( void* object, const char* index
 
    return false;
 }
+
+#endif // _SCENEPOLYHEDRALOBJECT_IMPL_H_