1 files changed, 1 insertions, 0 deletions
diff --git a/toynet.h b/toynet.h
index 2ecda641..4f87feb3 100644
--- a/toynet.h
+++ b/toynet.h
@@ -3,6 +3,7 @@
 // going to build it.
 
 #include <sys/socket.h>
+#include <sys/un.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>