diff --git a/platform/meson.build b/platform/meson.build
index 5a74cef..42e85ee 100644
--- a/platform/meson.build
+++ b/platform/meson.build
@@ -9,3 +9,34 @@
 if host_machine.endian() == 'big'
   add_project_arguments('-D__FLASHROM_BIG_ENDIAN__=1', language : 'c')
 endif
+
+# OpenBSD requires libi386 or libamd64 for I/O port handling
+if host_machine.system() == 'openbsd'
+  if host_machine.cpu_family() == 'x86'
+    libi386 = cc.find_library('i386')
+    deps += libi386
+  elif host_machine.cpu_family() == 'x86_64'
+    libamd64 = cc.find_library('amd64')
+    deps += libamd64
+  endif
+endif
+
+# NetBSD requires libx86 or libx86_64 for I/O port handling
+if host_machine.system() == 'netbsd'
+  if host_machine.cpu_family() == 'x86'
+    libx86 = cc.find_library('x86')
+    deps += libx86
+  elif host_machine.cpu_family() == 'x86_64'
+    libx86_64 = cc.find_library('x86_64')
+    deps += libx86_64
+  endif
+endif
+
+
+# SunOS requires external libraries for network sockets
+# they are used to support serial devices via network
+if host_machine.system() == 'sunos'
+  libsocket = cc.find_library('socket')
+  libnsl = cc.find_library('nsl')
+  deps += [ libsocket, libnsl]
+endif