diff --git a/ioapi.c b/ioapi.c
index 7f5c191..af7689a 100644
--- a/ioapi.c
+++ ioapi.c
@@ -14,7 +14,7 @@
#define _CRT_SECURE_NO_WARNINGS
#endif

-#if defined(__APPLE__) || defined(IOAPI_NO_64)
+#if defined(__APPLE__) || defined(IOAPI_NO_64) || defined(__OpenBSD__)
// In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
#define FTELLO_FUNC(stream) ftello(stream)

diff --git a/vid_sdl2.c b/vid_sdl2.c
index d4d5beb..afc64a8 100644
--- a/vid_sdl2.c
+++ vid_sdl2.c
@@ -26,7 +26,7 @@
#include <SDL.h>
#include <SDL_syswm.h>

-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
#include <X11/extensions/xf86vmode.h>
#endif

@@ -88,7 +88,7 @@ double vid_last_swap_time;
static SDL_DisplayMode *modelist;
static int modelist_count;

-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
static unsigned short sysramps[768];
#endif

@@ -329,7 +329,7 @@ static void VID_AbsolutePositionFromRelative(int* x, int* y, int* display)

static void VID_SetDeviceGammaRampReal(unsigned short *ramps)
{
-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
SDL_SysWMinfo info;
Display *display;
int screen;
@@ -367,7 +367,7 @@ static void VID_SetDeviceGammaRampReal(unsigned short *ramps)
vid_hwgamma_enabled = true;
}

-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
static void VID_RestoreSystemGamma(void)
{
VID_SetDeviceGammaRampReal(sysramps);
@@ -385,7 +385,7 @@ static void window_event(SDL_WindowEvent *event)

case SDL_WINDOWEVENT_FOCUS_LOST:
ActiveApp = false;
-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
/* Restore system gamma while client is out of focus/minimized */
VID_RestoreSystemGamma();
#endif
@@ -398,7 +398,7 @@ static void window_event(SDL_WindowEvent *event)
Minimized = false;
ActiveApp = true;
scr_skipupdate = 0;
-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
v_gamma.modified = true;
#endif
break;
@@ -616,7 +616,7 @@ void VID_Shutdown(void)

SDL_StopTextInput();

-#ifdef __linux__
+#if defined(__linux__) || defined(__OpenBSD__)
VID_RestoreSystemGamma();
#endif

diff --git a/q_shared.h b/q_shared.h
index a828a81..190f631 100644
--- a/q_shared.h
+++ q_shared.h
@@ -157,6 +157,20 @@ float FloatSwapPDP2Lit (float f);

#endif

+//======================= OpenBSD DEFINES ====================================
+#ifdef __OpenBSD__
+
+#include <machine/endian.h>
+#if BYTE_ORDER == BIG_ENDIAN
+#define __BIG_ENDIAN__
+#elif BYTE_ORDER == LITTLE_ENDIAN
+#define __LITTLE_ENDIAN__
+#elif BYTE_ORDER == PDP_ENDIAN
+#define __PDP_ENDIAN__
+#endif
+
+#endif
+
//======================= BYTE SWAPS =========================================
#if defined __BIG_ENDIAN__
#define BigShort(x) (x)

diff --git a/Makefile b/Makefile
index 325d6e7..ecd01e7 100644
--- a/Makefile
+++ Makefile
@@ -337,9 +337,12 @@ else
LIBS_c += -lGL
endif

- ifneq ($(SYS),FreeBSD)
+ ifeq ($(SYS),Linux)
LIBS_c += -ldl
endif
+ ifeq ($(SYS),Darwin)
+ LIB_c += -ldl
+ endif
endif

ifdef CONFIG_OGG

#!/bin/sh -

name=$(echo $1 | tr '.' '_')
len=$(cat $1 | wc -c)
hexdump -v -e '" " 12/1 "0x%.2x, " "\n"' < $1 | sed -e 's/ 0x,//g' |\
awk 'BEGIN { print "unsigned char '"$name"'[] = { " }
{ print }
END { print "};\nunsigned int '"$name"'_len = '"$len"';" }'