diff --git a/OWMakefile.os2 b/OWMakefile.os2
new file mode 100644
index 000000000..1bba8c30b
--- /dev/null
+++ b/OWMakefile.os2
@@ -0,0 +1,114 @@
+# Open Watcom Makefile to build a minimal OS/2 SDL2.dll
+
+DLLFILE = SDL2.dll
+IMPLIB  = SDL2.lib
+MAPFILE = SDL2.map
+EXPFILE = SDL2.exp
+LNKFILE = SDL2.lnk
+
+INCPATH = -I"$(%WATCOM)/h/os2" -I"$(%WATCOM)/h"
+INCPATH+= -Iinclude
+
+CFLAGS = -bt=os2 -d0 -q -bm -5s -fp5 -fpi87 -sg -oteanbmier -ei
+# max warnings:
+CFLAGS+= -wx
+# building dll:
+CFLAGS+= -bd
+# the include paths :
+CFLAGS+= $(INCPATH)
+# building SDL itself:
+CFLAGS+= -DBUILD_SDL
+
+# this is so that build doesn't fail with E1112:
+#CFLAGS+= -DSDL_POWER_DISABLED
+CFLAGS+= -DSDL_POWER_HARDWIRED
+
+.extensions:
+.extensions: .lib .dll .obj .c .asm
+
+.c: ./src;./src/dynapi;./src/audio;./src/cpuinfo;./src/events;./src/file;./src/haptic;./src/joystick;./src/power;./src/render;./src/render/software;./src/sensor;./src/stdlib;./src/thread;./src/timer;./src/video;./src/video/yuv2rgb;./src/haptic/dummy;./src/joystick/dummy;./src/loadso/dummy;./src/filesystem/dummy;./src/thread/generic;./src/timer/dummy;./src/power;./src/power/os2;./src/atomic;./src/audio/dummy;./src/audio/disk;./src/video/dummy;./src/sensor/dummy;./src/test;
+
+SRCS = SDL.c SDL_assert.c SDL_error.c SDL_log.c SDL_dataqueue.c SDL_hints.c
+SRCS+= SDL_getenv.c SDL_iconv.c SDL_malloc.c SDL_qsort.c SDL_stdlib.c SDL_string.c
+SRCS+= SDL_cpuinfo.c SDL_atomic.c SDL_spinlock.c SDL_thread.c SDL_timer.c
+SRCS+= SDL_rwops.c SDL_power.c
+SRCS+= SDL_audio.c SDL_audiocvt.c SDL_audiodev.c SDL_audiotypecvt.c SDL_mixer.c SDL_wave.c
+SRCS+= SDL_events.c SDL_quit.c SDL_keyboard.c SDL_mouse.c SDL_windowevents.c &
+       SDL_clipboardevents.c SDL_dropevents.c SDL_displayevents.c SDL_gesture.c &
+       SDL_sensor.c SDL_touch.c
+SRCS+= SDL_haptic.c SDL_gamecontroller.c SDL_joystick.c
+SRCS+= SDL_render.c yuv_rgb.c SDL_yuv.c SDL_yuv_sw.c SDL_blendfillrect.c &
+       SDL_blendline.c SDL_blendpoint.c SDL_drawline.c SDL_drawpoint.c &
+       SDL_render_sw.c SDL_rotate.c
+SRCS+= SDL_blit.c SDL_blit_0.c SDL_blit_1.c SDL_blit_A.c SDL_blit_auto.c &
+       SDL_blit_copy.c SDL_blit_N.c SDL_blit_slow.c SDL_fillrect.c SDL_bmp.c &
+       SDL_pixels.c SDL_rect.c SDL_RLEaccel.c SDL_shape.c SDL_stretch.c &
+       SDL_surface.c SDL_video.c SDL_clipboard.c SDL_vulkan_utils.c SDL_egl.c
+
+SRCS+= SDL_syscond.c SDL_sysmutex.c SDL_syssem.c SDL_systhread.c SDL_systls.c
+SRCS+= SDL_systimer.c
+SRCS+= SDL_sysloadso.c
+SRCS+= SDL_sysfilesystem.c
+SRCS+= SDL_syshaptic.c SDL_sysjoystick.c
+SRCS+= SDL_dummyaudio.c SDL_diskaudio.c
+SRCS+= SDL_nullvideo.c SDL_nullframebuffer.c SDL_nullevents.c
+SRCS+= SDL_dummysensor.c
+
+SRCS+= SDL_dynapi.c
+
+OBJS = $(SRCS:.c=.obj)
+
+all: $(DLLFILE) $(LIBFILE) .symbolic
+
+$(DLLFILE): $(OBJS) $(LNKFILE)
+    wlink @$(LNKFILE)
+
+$(IMPLIB): $(DLLFILE)
+    wlib -q -b -n -c -pa -s -t -zld -ii -io $* $(DLLFILE)
+
+.c.obj:
+    wcc386 $(CFLAGS) -fo=$^@ $<
+
+SDL_cpuinfo.obj: SDL_cpuinfo.c
+    wcc386 $(CFLAGS) -wcd=200 -fo=$^@ $<
+
+SDL_rwops.obj: SDL_rwops.c
+    wcc386 $(CFLAGS) -wcd=136 -fo=$^@ $<
+
+SDL_blendfillrect.obj: SDL_blendfillrect.c
+    wcc386 $(CFLAGS) -wcd=200 -fo=$^@ $<
+
+SDL_blendline.obj: SDL_blendline.c
+    wcc386 $(CFLAGS) -wcd=200 -fo=$^@ $<
+
+SDL_blendpoint.obj: SDL_blendpoint.c
+    wcc386 $(CFLAGS) -wcd=200 -fo=$^@ $<
+
+SDL_RLEaccel.obj: SDL_RLEaccel.c
+    wcc386 $(CFLAGS) -wcd=201 -fo=$^@ $<
+
+$(LNKFILE):
+    @%create $@
+    @%append $@ SYSTEM os2v2_dll INITINSTANCE TERMINSTANCE
+    @%append $@ NAME $(DLLFILE)
+    @for %i in ($(OBJS)) do @%append $@ FILE %i
+    @%append $@ OPTION QUIET
+    @%append $@ OPTION IMPF=$(EXPFILE)
+    @%append $@ OPTION MAP=$(MAPFILE)
+    @%append $@ OPTION QUIET
+    @%append $@ OPTION ELIMINATE
+    @%append $@ OPTION MANYAUTODATA
+    @%append $@ OPTION OSNAME='OS/2 and eComStation'
+    @%append $@ OPTION SHOWDEAD
+
+clean: .SYMBOLIC
+    @ echo * Clean: $(LIBNAME)
+    @if exist *.obj rm *.obj
+    @if exist *.err rm *.err
+    @if exist $(LNKFILE) rm $(LNKFILE)
+
+distclean: .SYMBOLIC clean
+    @if exist $(MAPFILE) rm $(MAPFILE)
+    @if exist $(EXPFILE) rm $(EXPFILE)
+    @if exist $(IMPLIB) rm $(IMPLIB)
+    @if exist $(DLLFILE) rm $(DLLFILE)
diff --git a/include/SDL_config.h b/include/SDL_config.h
index 7e0340cdf..32f4113ff 100644
--- a/include/SDL_config.h
+++ b/include/SDL_config.h
@@ -41,8 +41,10 @@
 #include "SDL_config_android.h"
 #elif defined(__PSP__)
 #include "SDL_config_psp.h"
+#elif defined(__OS2__)
+#include "SDL_config_os2.h"
 #else
-/* This is a minimal configuration just to get SDL running on new platforms */
+/* This is a minimal configuration just to get SDL running on new platforms. */
 #include "SDL_config_minimal.h"
 #endif /* platform config */
 
diff --git a/include/SDL_config_os2.h b/include/SDL_config_os2.h
new file mode 100644
index 000000000..eb1d7d44d
--- /dev/null
+++ b/include/SDL_config_os2.h
@@ -0,0 +1,169 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef SDL_config_os2_h_
+#define SDL_config_os2_h_
+#define SDL_config_h_
+
+#include "SDL_platform.h"
+
+#define SDL_AUDIO_DRIVER_DUMMY 1
+#define SDL_AUDIO_DRIVER_DISK 1
+
+#define SDL_JOYSTICK_DISABLED 1
+#define SDL_HAPTIC_DISABLED 1
+/*#undef SDL_JOYSTICK_HIDAPI */
+
+#define SDL_SENSOR_DUMMY 1
+#define SDL_VIDEO_DRIVER_DUMMY 1
+
+/* Enable OpenGL support */
+/* #undef SDL_VIDEO_OPENGL */
+
+/* Enable Vulkan support */
+/* #undef SDL_VIDEO_VULKAN */
+
+#define SDL_LOADSO_DISABLED 1
+#define SDL_THREADS_DISABLED 1
+#define SDL_TIMERS_DISABLED 1
+#define SDL_FILESYSTEM_DUMMY 1
+
+/* Enable assembly routines */
+#define SDL_ASSEMBLY_ROUTINES 1
+
+/* #undef HAVE_LIBSAMPLERATE_H */
+
+/* Enable dynamic libsamplerate support */
+/* #undef SDL_LIBSAMPLERATE_DYNAMIC */
+
+#define HAVE_LIBC 1
+
+#define HAVE_SYS_TYPES_H 1
+#define HAVE_STDIO_H 1
+#define STDC_HEADERS 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STDARG_H 1
+#define HAVE_STDDEF_H 1
+#define HAVE_MALLOC_H 1
+#define HAVE_MEMORY_H 1
+#define HAVE_STRING_H 1
+#define HAVE_STRINGS_H 1
+#define HAVE_WCHAR_H 1
+#define HAVE_INTTYPES_H 1
+#define HAVE_STDINT_H 1
+#define HAVE_LIMITS_H 1
+#define HAVE_CTYPE_H 1
+#define HAVE_MATH_H 1
+#define HAVE_FLOAT_H 1
+#define HAVE_SIGNAL_H 1
+
+#define HAVE_MALLOC 1
+#define HAVE_CALLOC 1
+#define HAVE_REALLOC 1
+#define HAVE_FREE 1
+#if defined(__WATCOMC__)
+#define HAVE__FSEEKI64 1
+#define HAVE__FTELLI64 1
+#endif
+#define HAVE_ALLOCA 1
+#define HAVE_GETENV 1
+#define HAVE_SETENV 1
+#define HAVE_PUTENV 1
+#define HAVE_QSORT 1
+#define HAVE_ABS 1
+#define HAVE_BCOPY 1
+#define HAVE_MEMSET 1
+#define HAVE_MEMCPY 1
+#define HAVE_MEMMOVE 1
+#define HAVE_MEMCMP 1
+#define HAVE_WCSLEN 1
+#define HAVE_WCSLCPY 1
+#define HAVE_WCSLCAT 1
+#define HAVE_WCSCMP 1
+#define HAVE_STRLEN 1
+#define HAVE_STRLCPY 1
+#define HAVE_STRLCAT 1
+#define HAVE__STRREV 1
+#define HAVE__STRUPR 1
+#define HAVE__STRLWR 1
+#define HAVE_INDEX 1
+#define HAVE_RINDEX 1
+#define HAVE_STRCHR 1
+#define HAVE_STRRCHR 1
+#define HAVE_STRSTR 1
+#define HAVE_ITOA 1
+#define HAVE__LTOA 1
+#define HAVE__ULTOA 1
+#define HAVE_STRTOL 1
+#define HAVE_STRTOUL 1
+#define HAVE__I64TOA 1
+#define HAVE__UI64TOA 1
+#define HAVE_STRTOLL 1
+#define HAVE_STRTOULL 1
+#define HAVE_STRTOD 1
+#define HAVE_ATOI 1
+#define HAVE_ATOF 1
+#define HAVE_STRCMP 1
+#define HAVE_STRNCMP 1
+#define HAVE_STRICMP 1
+#define HAVE_STRCASECMP 1
+#define HAVE_STRNCASECMP 1
+#define HAVE_SSCANF 1
+#define HAVE_SNPRINTF 1
+#define HAVE_VSNPRINTF 1
+#define HAVE_SETJMP 1
+#define HAVE_ACOS 1
+/* #undef HAVE_ACOSF */
+#define HAVE_ASIN 1
+/* #undef HAVE_ASINF */
+#define HAVE_ATAN 1
+#define HAVE_ATAN2 1
+/* #undef HAVE_ATAN2F */
+#define HAVE_CEIL 1
+/* #undef HAVE_CEILF */
+/* #undef HAVE_COPYSIGN */
+/* #undef HAVE_COPYSIGNF */
+#define HAVE_COS 1
+/* #undef HAVE_COSF */
+#define HAVE_EXP 1
+/* #undef HAVE_EXPF */
+#define HAVE_FABS 1
+/* #undef HAVE_FABSF */
+#define HAVE_FLOOR 1
+/* #undef HAVE_FLOORF */
+#define HAVE_FMOD 1
+/* #undef HAVE_FMODF */
+#define HAVE_LOG 1
+/* #undef HAVE_LOGF */
+#define HAVE_LOG10 1
+/* #undef HAVE_LOG10F */
+#define HAVE_POW 1
+/* #undef HAVE_POWF */
+#define HAVE_SIN 1
+/* #undef HAVE_SINF */
+/* #undef HAVE_SCALBN */
+/* #undef HAVE_SCALBNF */
+#define HAVE_SQRT 1
+/* #undef HAVE_SQRTF */
+#define HAVE_TAN 1
+/* #undef HAVE_TANF */
+
+#endif /* SDL_config_os2_h_ */