Index: src/melt/io.c
--- src/melt/io.c.orig
+++ src/melt/io.c
@@ -29,6 +29,7 @@
 #ifndef _WIN32
 #include <termios.h>
 #include <unistd.h>
+#include <sys/time.h>
 #else
 // MinGW defines struct timespec in pthread.h
 #include <pthread.h>
