diff --git a/src/slirp/ip_input.c b/src/slirp/ip_input.c
index 7600f24..f6fc4a3 100644
--- a/src/slirp/ip_input.c
+++ b/src/slirp/ip_input.c
@@ -40,6 +40,7 @@
 
 #include "slirp.h"
 #include "ip_icmp.h"
+#include <stdint.h>
 
 int ip_defttl;
 struct ipstat ipstat;