diff --git a/hw/xfree86/os-support/bsd/alpha_video.c b/hw/xfree86/os-support/bsd/alpha_video.c
index 3d1d92467..4d61eeac2 100644
--- a/hw/xfree86/os-support/bsd/alpha_video.c
+++ b/hw/xfree86/os-support/bsd/alpha_video.c
@@ -42,13 +42,7 @@
 #include "xf86_os_support.h"
 #include "xf86_OSlib.h"
 
-#define DEV_MEM "/dev/mem"
-
-#if defined(__NetBSD__) && !defined(MAP_FILE)
-#define MAP_FLAGS MAP_SHARED
-#else
-#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
-#endif
+#include "xf86_bsd_priv.h"
 
 #ifndef __NetBSD__
 extern unsigned long dense_base(void);
@@ -93,10 +87,6 @@ dense_base(void)
 
 static int devMemFd = -1;
 
-#ifdef HAS_APERTURE_DRV
-#define DEV_APERTURE "/dev/xf86"
-#endif
-
 /*
  * Check if /dev/mem can be mmap'd.  If it can't print a warning when
  * "warn" is TRUE.
diff --git a/hw/xfree86/os-support/bsd/arm_video.c b/hw/xfree86/os-support/bsd/arm_video.c
index b3da3b2ba..ac34c9ad6 100644
--- a/hw/xfree86/os-support/bsd/arm_video.c
+++ b/hw/xfree86/os-support/bsd/arm_video.c
@@ -70,13 +70,7 @@
 #include "xf86_OSlib.h"
 #include "compiler.h"
 
-#define DEV_MEM "/dev/mem"
-
-#if defined(__NetBSD__) && !defined(MAP_FILE)
-#define MAP_FLAGS MAP_SHARED
-#else
-#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
-#endif
+#include "xf86_bsd_priv.h"
 
 #define BUS_BASE	0L
 #define BUS_BASE_BWX	0L
diff --git a/hw/xfree86/os-support/bsd/i386_video.c b/hw/xfree86/os-support/bsd/i386_video.c
index ef64a61ed..6374b5f80 100644
--- a/hw/xfree86/os-support/bsd/i386_video.c
+++ b/hw/xfree86/os-support/bsd/i386_video.c
@@ -40,13 +40,7 @@
 #include <machine/sysarch.h>
 #endif
 
-#define DEV_MEM "/dev/mem"
-
-#if defined(__NetBSD__) && !defined(MAP_FILE)
-#define MAP_FLAGS MAP_SHARED
-#else
-#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
-#endif
+#include "xf86_bsd_priv.h"
 
 #ifndef CONSOLE_X_TV_ON
 #define CONSOLE_X_TV_ON _IOW('t',155,int)
@@ -73,10 +67,6 @@
 static Bool useDevMem = FALSE;
 static int devMemFd = -1;
 
-#ifdef HAS_APERTURE_DRV
-#define DEV_APERTURE "/dev/xf86"
-#endif
-
 /*
  * Check if /dev/mem can be mmap'd.  If it can't print a warning when
  * "warn" is TRUE.
diff --git a/hw/xfree86/os-support/bsd/ppc_video.c b/hw/xfree86/os-support/bsd/ppc_video.c
index 7a64f4b83..493f886ee 100644
--- a/hw/xfree86/os-support/bsd/ppc_video.c
+++ b/hw/xfree86/os-support/bsd/ppc_video.c
@@ -37,6 +37,8 @@
 
 #include "bus/Pci.h"
 
+#include "xf86_bsd_priv.h"
+
 /***************************************************************************/
 /* Video Memory Mapping section                                            */
 /***************************************************************************/
diff --git a/hw/xfree86/os-support/bsd/xf86_bsd_priv.h b/hw/xfree86/os-support/bsd/xf86_bsd_priv.h
new file mode 100644
index 000000000..477f2d054
--- /dev/null
+++ b/hw/xfree86/os-support/bsd/xf86_bsd_priv.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: MIT OR X11
+ *
+ * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
+ */
+#ifndef _XSERVER_XFREE86_OS_SUPPORT_BSD_PRIV_H
+#define _XSERVER_XFREE86_OS_SUPPORT_BSD_PRIV_H
+
+#ifdef __OpenBSD__
+#define DEV_MEM "/dev/xf86"
+#else
+#define DEV_MEM "/dev/mem"
+#endif
+
+#if defined(__NetBSD__) && !defined(MAP_FILE)
+#define MAP_FLAGS MAP_SHARED
+#else
+#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
+#endif
+
+#define DEV_APERTURE "/dev/xf86"
+
+#endif /* _XSERVER_XFREE86_OS_SUPPORT_BSD_PRIV_H */