--- a/src/sispm_ctl.c
+++ b/src/sispm_ctl.c
@@ -33,6 +33,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <time.h>
+#include <sys/types.h>
 #include <usb.h>
 #include <assert.h>
 #include "sispm_ctl.h"
--- a/src/main.c
+++ b/src/main.c
@@ -34,11 +34,11 @@
 #define __USE_XOPEN
 #include <time.h>
 #include <signal.h>
-#include <usb.h>
 #include <assert.h>
 #include <getopt.h>
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <usb.h>
 
 #include <fcntl.h>