diff --git a/src/xrCDB/ISpatial_q_frustum.cpp b/src/xrCDB/ISpatial_q_frustum.cpp
index 52a2c8b22e4..89645cbdede 100644
--- a/src/xrCDB/ISpatial_q_frustum.cpp
+++ b/src/xrCDB/ISpatial_q_frustum.cpp
@@ -1,6 +1,6 @@
 #include "stdafx.h"
 #include "ISpatial.h"
-#include "frustum.h"
+#include "Frustum.h"
 
 extern Fvector	c_spatial_offset[8];
 
diff --git a/src/xrCDB/xrCDB_frustum.cpp b/src/xrCDB/xrCDB_frustum.cpp
index a1f49453552..60dc710c099 100644
--- a/src/xrCDB/xrCDB_frustum.cpp
+++ b/src/xrCDB/xrCDB_frustum.cpp
@@ -2,7 +2,7 @@
 #pragma hdrstop
 
 #include "xrCDB.h"
-#include "frustum.h"
+#include "Frustum.h"
 
 using namespace CDB;
 using namespace Opcode;
diff --git a/src/xrCDB/xr_area_query.cpp b/src/xrCDB/xr_area_query.cpp
index a83a250043f..6636a02e8f2 100644
--- a/src/xrCDB/xr_area_query.cpp
+++ b/src/xrCDB/xr_area_query.cpp
@@ -1,6 +1,6 @@
 #include "stdafx.h"
 #include "xr_area.h"
-#include "frustum.h"
+#include "Frustum.h"
 
 #include "xrCore/_vector3d_ext.h"
 
diff --git a/src/xrCDB/xr_area_raypick.cpp b/src/xrCDB/xr_area_raypick.cpp
index 4c334f8043e..108c348a655 100644
--- a/src/xrCDB/xr_area_raypick.cpp
+++ b/src/xrCDB/xr_area_raypick.cpp
@@ -1,6 +1,6 @@
 #include "stdafx.h"
 #include "xr_area.h"
-#include "ispatial.h"
+#include "ISpatial.h"
 #include "xrEngine/xr_collide_form.h"
 #include "xrEngine/xr_object.h"
 #include "Intersect.hpp"