diff --git a/src/sock_inet.c b/src/sock_inet.c
index 3b7b0fe..7a87fbe 100644
--- a/src/sock_inet.c
+++ b/src/sock_inet.c
@@ -10,6 +10,7 @@
  *
  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>