diff --git a/src/say.c b/src/say.c
index 7f018ec11f0fc65caec93f99dec6dd90a18bba79..860176ac21857523c6c1fbf17827c27ee5f2f092 100644
--- a/src/say.c
+++ b/src/say.c
@@ -37,6 +37,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <netdb.h>
+#include <netinet/in.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <fcntl.h>