diff --git a/Makefile.am b/Makefile.am
index cf8fe5f..fbc45e8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,7 +24,10 @@ AM_CPPFLAGS = -I$(top_srcdir)
 
 lib_LTLIBRARIES = libserialport.la
 
-libserialport_la_SOURCES = serialport.c linux_termios.c linux_termios.h
+libserialport_la_SOURCES = serialport.c linux_termios.h
+if LINUX
+libserialport_la_SOURCES += linux_termios.c
+endif
 
 libserialport_la_LIBADD = $(LIBOBJS)
 
diff --git a/configure.ac b/configure.ac
index 3030d1d..961031d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -79,6 +79,7 @@ SP_PKGLIBS=""
 
 case $target_os in
 *linux*)
+	AM_CONDITIONAL([LINUX], true)
 	# On Linux libudev is currently required for enumeration.
 	AC_ARG_WITH([libudev],
             [AS_HELP_STRING([--with-libudev],
@@ -90,9 +91,12 @@ case $target_os in
 		SP_PKGLIBS="$SP_PKGLIBS libudev"; AC_DEFINE(HAVE_LIBUDEV)])], [])
 	;;
 *darwin*)
+	AM_CONDITIONAL([LINUX], false)
 	LDFLAGS="$LDFLAGS -Wl,-framework -Wl,IOKit -Wl,-framework -Wl,CoreFoundation"
 	AC_CHECK_HEADER(IOKit/IOKitLib.h, [], [AC_MSG_ERROR([IOKit/IOKitLib.h not found])])
 	;;
+*)
+	AM_CONDITIONAL([LINUX], false)
 esac
 
 AC_SUBST(SP_PKGLIBS)