diff --git a/src/usb_moded.c b/src/usb_moded.c
index e434581..d0b5820 100644
--- a/src/usb_moded.c
+++ b/src/usb_moded.c
@@ -61,6 +61,7 @@
 #endif
 
 #include <getopt.h>
+#include <unistd.h>
 
 #ifdef SAILFISH_ACCESS_CONTROL
 # include <sailfishaccesscontrol.h>