diff --git a/src/uart/uart.c b/src/uart/uart.c
index 6d3973a..0f8a2e3 100644
--- a/src/uart/uart.c
+++ b/src/uart/uart.c
@@ -29,10 +29,15 @@
 #include <unistd.h>
 #include <string.h>
 #include <termios.h>
+#include <sys/select.h>
 
 #include "uart.h"
 #include "mraa_internal.h"
 
+#ifndef CMSPAR
+#define CMSPAR   010000000000
+#endif
+
 // This function takes an unsigned int and converts it to a B* speed_t
 // that can be used with linux/posix termios
 static speed_t