diff --git a/source/exhumed/src/aistuff.h b/source/exhumed/src/aistuff.h
index f9c4c74e3..bb7c09b9c 100644
--- a/source/exhumed/src/aistuff.h
+++ b/source/exhumed/src/aistuff.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __aistuff_h__
-#define __aistuff_h__
+#pragma once 
 
 #include "compat.h"
 
@@ -522,4 +521,3 @@ inline int GrabTimeSlot(int nVal) { return -1; }
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/engine.h b/source/exhumed/src/engine.h
index 3f5909851..90b44e929 100644
--- a/source/exhumed/src/engine.h
+++ b/source/exhumed/src/engine.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __engine_h__
-#define __engine_h__
+#pragma once 
 
 #include "compat.h"
 #include "build.h"
@@ -148,4 +147,3 @@ inline int Cos(int angle)
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/exhumed.h b/source/exhumed/src/exhumed.h
index 92f2bbf92..e552e6e63 100644
--- a/source/exhumed/src/exhumed.h
+++ b/source/exhumed/src/exhumed.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __exhumed_h__
-#define __exhumed_h__
+#pragma once
 
 #include "compat.h"
 #include "v_text.h"
@@ -268,4 +267,3 @@ struct GameInterface : ::GameInterface
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/names.h b/source/exhumed/src/names.h
index bd0d6bb5d..52a49a2a2 100644
--- a/source/exhumed/src/names.h
+++ b/source/exhumed/src/names.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __names_h__
-#define __names_h__
+#pragma once 
 
 #define kTile0 0
 #define kTile1 1
@@ -6146,4 +6145,3 @@ enum
 
 END_PS_NS
 
-#endif
\ No newline at end of file
diff --git a/source/exhumed/src/player.h b/source/exhumed/src/player.h
index 40293001a..924dadb90 100644
--- a/source/exhumed/src/player.h
+++ b/source/exhumed/src/player.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __player_h__
-#define __player_h__
+#pragma once 
 
 #include "compat.h"
 
@@ -130,4 +129,3 @@ void UpdatePlayerSpriteAngle(Player* pPlayer);
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/ps_input.h b/source/exhumed/src/ps_input.h
index 9ecc7f9f8..0c7b4953a 100644
--- a/source/exhumed/src/ps_input.h
+++ b/source/exhumed/src/ps_input.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __input_h__
-#define __input_h__
+#pragma once 
 
 #include "compat.h"
 #include "packet.h"
@@ -67,4 +66,3 @@ extern int lLocalCodes;
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/sequence.h b/source/exhumed/src/sequence.h
index 46760529b..02fce2151 100644
--- a/source/exhumed/src/sequence.h
+++ b/source/exhumed/src/sequence.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __sequence_h__
-#define __sequence_h__
+#pragma once 
 
 #include "compat.h"
 
@@ -147,4 +146,3 @@ void seq_DrawPilotLightSeq(double xOffset, double yOffset);
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/sound.h b/source/exhumed/src/sound.h
index 5904594de..6920c88db 100644
--- a/source/exhumed/src/sound.h
+++ b/source/exhumed/src/sound.h
@@ -16,9 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __sound_h__
-#define __sound_h__
-
+#pragma once 
 #include "raze_sound.h"
 
 BEGIN_PS_NS
@@ -149,5 +147,3 @@ void PlayGameOverSound(void);
 void SoundBigEntrance(void);
 
 END_PS_NS
-
-#endif
diff --git a/source/exhumed/src/status.h b/source/exhumed/src/status.h
index 3f5c92c3f..8536652dd 100644
--- a/source/exhumed/src/status.h
+++ b/source/exhumed/src/status.h
@@ -16,8 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __status_h__
-#define __status_h__
+#pragma once
 
 BEGIN_PS_NS
 
@@ -41,4 +40,3 @@ void SetCounterImmediate(short nVal);
 
 END_PS_NS
 
-#endif
diff --git a/source/exhumed/src/view.h b/source/exhumed/src/view.h
index 5cfef45a5..1acc748c3 100644
--- a/source/exhumed/src/view.h
+++ b/source/exhumed/src/view.h
@@ -16,9 +16,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 //-------------------------------------------------------------------------
 
-#ifndef __view_h__
-#define __view_h__
-
+#pragma once 
 #include "build.h"
 
 BEGIN_PS_NS
@@ -55,4 +53,3 @@ static inline int angle_interpolate16(int a, int b, int smooth)
 
 END_PS_NS
 
-#endif