diff --git a/Makefile b/Makefile
index 53e993d1..9ee0b0ba 100644
--- a/Makefile
+++ b/Makefile
@@ -113,7 +113,7 @@ clean:
 #------------------------------------------------------------------------------
 # make install is validated only for Linux, macOS, Hurd and some BSD targets
 #------------------------------------------------------------------------------
-ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD DragonFly NetBSD MSYS_NT))
+ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD DragonFly NetBSD MSYS_NT Haiku))
 
 HOST_OS = POSIX
 CMAKE_PARAMS = -DZSTD_BUILD_CONTRIB:BOOL=ON -DZSTD_BUILD_STATIC:BOOL=ON -DZSTD_BUILD_TESTS:BOOL=ON -DZSTD_ZLIB_SUPPORT:BOOL=ON -DZSTD_LZMA_SUPPORT:BOOL=ON -DCMAKE_BUILD_TYPE=Release
diff --git a/lib/Makefile b/lib/Makefile
index 3502464b..9711f75e 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -166,7 +166,7 @@ clean:
 #-----------------------------------------------------------------------------
 # make install is validated only for Linux, macOS, BSD, Hurd and Solaris targets
 #-----------------------------------------------------------------------------
-ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS))
+ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku))
 
 DESTDIR     ?=
 # directory variables : GNU conventions prefer lowercase
diff --git a/programs/Makefile b/programs/Makefile
index 5948cf15..8faa5111 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -260,7 +260,7 @@ preview-man: clean-man man
 #-----------------------------------------------------------------------------
 # make install is validated only for Linux, macOS, BSD, Hurd and Solaris targets
 #-----------------------------------------------------------------------------
-ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS))
+ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku))
 
 EGREP = egrep --color=never
 
diff --git a/programs/platform.h b/programs/platform.h
index 89eba37e..aa19ee12 100644
--- a/programs/platform.h
+++ b/programs/platform.h
@@ -70,9 +70,10 @@ extern "C" {
 *  PLATFORM_POSIX_VERSION >= 1 is equal to found _POSIX_VERSION
 ***************************************************************/
 #if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__)) /* UNIX-like OS */ \
-   || defined(__midipix__) || defined(__VMS))
+   || defined(__midipix__) || defined(__VMS) || defined(__HAIKU__))
 #  if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1-2001 (SUSv3) conformant */ \
-     || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)  /* BSD distros */
+     || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)  /* BSD distros */ \
+     || defined(__HAIKU__)
 #    define PLATFORM_POSIX_VERSION 200112L
 #  else
 #    if defined(__linux__) || defined(__linux)