diff --git a/src/gl/system/gl_system.h b/src/gl/system/gl_system.h
index db7f1f890..a8dcd129e 100644
--- a/src/gl/system/gl_system.h
+++ b/src/gl/system/gl_system.h
@@ -15,7 +15,7 @@
 #include <errno.h>
 #include <stdarg.h>
 #include <signal.h>
-#if !defined(__APPLE__) && !defined(__FreeBSD__)
+#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
 #include <malloc.h>
 #endif
 #include <time.h>
diff --git a/src/m_alloc.cpp b/src/m_alloc.cpp
index 3b601d716..bec5581e3 100644
--- a/src/m_alloc.cpp
+++ b/src/m_alloc.cpp
@@ -38,6 +38,8 @@
 #elif defined(__APPLE__)
 #include <stdlib.h>
 #include <malloc/malloc.h>
+#elif defined(__OpenBSD__)
+#include <stdlib.h>
 #else
 #include <malloc.h>
 #endif
@@ -52,14 +54,14 @@
 #endif
 #if defined(__APPLE__)
 #define _msize(p)				malloc_size(p)
-#elif defined(__sun)
+#elif __solaris__ || defined(__OpenBSD__)
 #define _msize(p)				(*((size_t*)(p)-1))
 #elif !defined(_WIN32)
 #define _msize(p)				malloc_usable_size(p)	// from glibc/FreeBSD
 #endif
 
 #ifndef _DEBUG
-#if !defined(__sun)
+#if !__solaris__ && !defined(__OpenBSD__)
 void *M_Malloc(size_t size)
 {
 	void *block = malloc(size);
@@ -129,7 +131,7 @@ void *M_Realloc(void *memblock, size_t size)
 #include <crtdbg.h>
 #endif
 
-#if !defined(__sun)
+#if !__solaris__ && !defined(__OpenBSD__)
 void *M_Malloc_Dbg(size_t size, const char *file, int lineno)
 {
 	void *block = _malloc_dbg(size, _NORMAL_BLOCK, file, lineno);
@@ -197,7 +199,7 @@ void *M_Realloc_Dbg(void *memblock, size_t size, const char *file, int lineno)
 #endif
 #endif
 
-#if !defined(__sun)
+#if !__solaris__ && !defined(__OpenBSD__)
 void M_Free (void *block)
 {
 	if (block != NULL)
diff --git a/src/posix/i_system.h b/src/posix/i_system.h
index 4d0577467..d56d53e2d 100644
--- a/src/posix/i_system.h
+++ b/src/posix/i_system.h
@@ -30,6 +30,8 @@
 #include <dirent.h>
 #include <ctype.h>
 
+#define __solaris__ (defined(__sun) || defined(__sun__) || defined(__SRV4) || defined(__srv4__))
+
 #include "doomtype.h"
 
 struct ticcmd_t;
diff --git a/src/posix/sdl/crashcatcher.c b/src/posix/sdl/crashcatcher.c
index 70c9e7b0c..11e5d179f 100644
--- a/src/posix/sdl/crashcatcher.c
+++ b/src/posix/sdl/crashcatcher.c
@@ -5,7 +5,6 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <sys/param.h>
-#include <sys/ucontext.h>
 #include <string.h>
 #include <errno.h>
 #include <limits.h>
@@ -15,7 +14,7 @@
 #ifndef PR_SET_PTRACER
 #define PR_SET_PTRACER 0x59616d61
 #endif
-#elif defined (__APPLE__) || defined (__FreeBSD__)
+#elif defined (__APPLE__) || defined (__FreeBSD__) || defined(__OpenBSD__)
 #include <signal.h>
 #endif
 
diff --git a/src/posix/sdl/hardware.cpp b/src/posix/sdl/hardware.cpp
index eeb5f6ec4..b46458370 100644
--- a/src/posix/sdl/hardware.cpp
+++ b/src/posix/sdl/hardware.cpp
@@ -241,7 +241,7 @@ void I_ClosestResolution (int *width, int *height, int bits)
 EXTERN_CVAR(Int, vid_maxfps);
 EXTERN_CVAR(Bool, cl_capfps);
 
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
 Semaphore FPSLimitSemaphore;
 
 static void FPSLimitNotify(sigval val)
@@ -334,8 +334,8 @@ CUSTOM_CVAR(Bool, swtruecolor, true, CVAR_ARCHIVE|CVAR_GLOBALCONFIG|CVAR_NOINITC
 
 CUSTOM_CVAR (Bool, fullscreen, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG|CVAR_NOINITCALL)
 {
-	NewWidth = screen->VideoWidth;
-	NewHeight = screen->VideoHeight;
+	NewWidth = screen->GetWidth();
+	NewHeight = screen->GetHeight();
 	NewBits = DisplayBits;
 	setmodeneeded = true;
 }
diff --git a/src/posix/sdl/sdlglvideo.cpp b/src/posix/sdl/sdlglvideo.cpp
index 6401e52cf..f09767f58 100644
--- a/src/posix/sdl/sdlglvideo.cpp
+++ b/src/posix/sdl/sdlglvideo.cpp
@@ -535,7 +535,7 @@ void SDLGLFB::NewRefreshRate ()
 
 void SDLGLFB::SwapBuffers()
 {
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
 	if (vid_maxfps && !cl_capfps)
 	{
 		SEMAPHORE_WAIT(FPSLimitSemaphore)
diff --git a/src/posix/sdl/sdlvideo.cpp b/src/posix/sdl/sdlvideo.cpp
index 828a47f74..905e2de78 100644
--- a/src/posix/sdl/sdlvideo.cpp
+++ b/src/posix/sdl/sdlvideo.cpp
@@ -227,7 +227,7 @@ void SDLFB::Update ()
 
 	DrawRateStuff ();
 
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
 	if(vid_maxfps && !cl_capfps)
 	{
 		SEMAPHORE_WAIT(FPSLimitSemaphore)
diff --git a/src/sound/i_music.cpp b/src/sound/i_music.cpp
index 8ee359e8f..b66e5d096 100644
--- a/src/sound/i_music.cpp
+++ b/src/sound/i_music.cpp
@@ -39,7 +39,6 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <unistd.h>
-#include <wordexp.h>
 #include "mus2midi.h"
 extern void ChildSigHandler (int signum);
 #endif
diff --git a/src/sound/mididevices/music_timiditypp_mididevice.cpp b/src/sound/mididevices/music_timiditypp_mididevice.cpp
index b6ba6997d..39a7dcb78 100644
--- a/src/sound/mididevices/music_timiditypp_mididevice.cpp
+++ b/src/sound/mididevices/music_timiditypp_mididevice.cpp
@@ -46,7 +46,7 @@
 
 #include <sys/types.h>
 #include <sys/wait.h>
-#include <wordexp.h>
+#include <glob.h>
 #include <signal.h>
 
 int ChildQuit;
@@ -523,15 +523,15 @@ bool TimidityPPMIDIDevice::LaunchTimidity ()
 	}
 	
 	int forkres;
-	wordexp_t words = {};
+	glob_t glb;
 
-	switch (wordexp (CommandLine.GetChars(), &words, 0))
+	switch (glob (CommandLine.GetChars(), 0, NULL, &glb))
 	{
 	case 0: // all good
 		break;
 		
-	case WRDE_NOSPACE:
-		wordfree (&words);
+	case GLOB_NOSPACE:
+		globfree (&glb);
 	default:
 		return false;
 	}
@@ -546,7 +546,7 @@ bool TimidityPPMIDIDevice::LaunchTimidity ()
 //		freopen ("/dev/null", "w", stderr);
 		close (WavePipe[1]);
 
-		execvp (words.we_wordv[0], words.we_wordv);
+		execvp (glb.gl_pathv[0], glb.gl_pathv);
 		fprintf(stderr,"execvp failed\n");
 		_exit (0);	// if execvp succeeds, we never get here
 	}
@@ -567,7 +567,7 @@ bool TimidityPPMIDIDevice::LaunchTimidity ()
 		}*/
 	}
 	
-	wordfree (&words);
+	globfree (&glb);
 	return ChildProcess != -1;
 #endif // _WIN32
 }
diff --git a/src/sound/musicformats/music_mus_midiout.cpp b/src/sound/musicformats/music_mus_midiout.cpp
index 955c293a7..8058944a7 100644
--- a/src/sound/musicformats/music_mus_midiout.cpp
+++ b/src/sound/musicformats/music_mus_midiout.cpp
@@ -33,7 +33,7 @@
 
 // HEADER FILES ------------------------------------------------------------
 
-#if !defined(__FreeBSD__) && !defined(__APPLE__)
+#if !defined(__FreeBSD__) && !defined(__APPLE__) && !defined(__OpenBSD__)
 #include <malloc.h>
 #else
 #include <stdlib.h>