diff --git a/CMakeLists.txt b/CMakeLists.txt
index 419677c0a..244bbc4fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -155,7 +155,7 @@ if(CMAKE_GENERATOR STREQUAL "Ninja")
   add_c_compiler_flag_if_supported(OUR_FLAGS -fcolor-diagnostics)
 endif()
 
-if(NOT MSVC)
+if(NOT MSVC AND NOT HAIKU)
   if(CMAKE_VERSION VERSION_LESS 3.1 OR TARGET_OS STREQUAL "mac")
     check_cxx_compiler_flag(-std=gnu++11 FLAG_SUPPORTED_std_gnu__11)
     if(FLAG_SUPPORTED_std_gnu__11)
@@ -210,9 +210,15 @@ if(NOT MSVC)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wthread-safety)
   # TODO: Enable for C++ code except gtest
   #add_cxx_compiler_flag_if_supported(OUR_FLAGS_OWN "-Wuseless-cast")
+else()
+  if(TARGET_OS STREQUAL "haiku")
+    set(PLATFORM_CLIENT)
+    find_package(OpenGL)
+    set(PLATFORM_LIBS GL network)
+  endif()
 endif()
 
-if(NOT MSVC)
+if(NOT MSVC AND NOT HAIKU)
   check_c_compiler_flag("-O2;-Wp,-Werror;-D_FORTIFY_SOURCE=2" DEFINE_FORTIFY_SOURCE) # Some distributions define _FORTIFY_SOURCE by themselves.
 endif()
 
diff --git a/src/base/detect.h b/src/base/detect.h
index 914c4760b..19a2386d4 100644
--- a/src/base/detect.h
+++ b/src/base/detect.h
@@ -82,6 +82,13 @@
 #define PLATFORM_STRING "beos"
 #endif
 
+#if defined(__HAIKU__)
+#define CONF_FAMILY_UNIX 1
+#define CONF_FAMILY_STRING "unix"
+#define CONF_PLATFORM_HAIKU 1
+#define CONF_PLATFORM_STRING "haiku"
+#endif
+
 /* use gcc endianness definitions when available */
 #if defined(__GNUC__) && !defined(__APPLE__) && !defined(__MINGW32__) && !defined(__sun)
 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
diff --git a/src/base/system.c b/src/base/system.c
index 1497c6446..6794f1810 100644
--- a/src/base/system.c
+++ b/src/base/system.c
@@ -2078,6 +2078,11 @@ int fs_storage_path(const char *appname, char *path, int max)
 	if(!home)
 		return -1;
 
+#if defined(CONF_PLATFORM_HAIKU)
+	str_format(path, max, "%s/config/settings/%s", home, appname);
+	return 0;
+#endif
+
 #if defined(CONF_PLATFORM_MACOS)
 	snprintf(path, max, "%s/Library/Application Support/%s", home, appname);
 #else
@@ -2117,6 +2122,11 @@ int fs_makedir(const char *path)
 		return 0;
 	return -1;
 #else
+#ifdef CONF_PLATFORM_HAIKU
+	struct stat st;
+	if(stat(path, &st) == 0)
+		return 0;
+#endif
 	if(mkdir(path, 0755) == 0)
 		return 0;
 	if(errno == EEXIST)
diff --git a/src/base/system.h b/src/base/system.h
index 6b1363832..dd354e181 100644
--- a/src/base/system.h
+++ b/src/base/system.h
@@ -631,7 +631,11 @@ void sphore_destroy(SEMAPHORE *sem);
 /* if compiled with -pedantic-errors it will complain about long
 	not being a C90 thing.
 */
+#ifdef CONF_PLATFORM_HAIKU
+#include <SupportDefs.h>
+#else
 __extension__ typedef long long int64;
+#endif
 __extension__ typedef unsigned long long uint64;
 #else
 typedef long long int64;
diff --git a/src/engine/client/backend_sdl.cpp b/src/engine/client/backend_sdl.cpp
index 0042bd0cb..0e33d2a87 100644
--- a/src/engine/client/backend_sdl.cpp
+++ b/src/engine/client/backend_sdl.cpp
@@ -4777,7 +4777,7 @@ void CGraphicsBackend_SDL_OpenGL::SetWindowParams(int FullscreenMode, bool IsBor
 	{
 		if(FullscreenMode == 1)
 		{
-#if defined(CONF_PLATFORM_MACOS) // Todo SDL: remove this when fixed (game freezes when losing focus in fullscreen)
+#if defined(CONF_PLATFORM_MACOS) || defined(CONF_PLATFORM_HAIKU) // Todo SDL: remove this when fixed (game freezes when losing focus in fullscreen)
 			SDL_SetWindowFullscreen(m_pWindow, SDL_WINDOW_FULLSCREEN_DESKTOP);
 #else
 			SDL_SetWindowFullscreen(m_pWindow, SDL_WINDOW_FULLSCREEN);
diff --git a/src/engine/shared/storage.cpp b/src/engine/shared/storage.cpp
index 332a8d643..9b6f9a292 100644
--- a/src/engine/shared/storage.cpp
+++ b/src/engine/shared/storage.cpp
@@ -6,6 +6,10 @@
 #include <engine/client/updater.h>
 #include <engine/storage.h>
 
+#ifdef CONF_PLATFORM_HAIKU
+#include <stdlib.h>
+#endif
+
 class CStorage : public IStorage
 {
 public:
@@ -193,6 +197,9 @@ public:
 
 		// 3) check for usable path in argv[0]
 		{
+#ifdef CONF_PLATFORM_HAIKU
+			pArgv0 = realpath(pArgv0, NULL);
+#endif
 			unsigned int Pos = ~0U;
 			for(unsigned i = 0; pArgv0[i]; i++)
 				if(pArgv0[i] == '/' || pArgv0[i] == '\\')
@@ -211,6 +218,9 @@ public:
 				}
 			}
 		}
+#ifdef CONF_PLATFORM_HAIKU
+		free((void *)pArgv0);
+#endif
 
 #if defined(CONF_FAMILY_UNIX)
 		// 4) check for all default locations