diff --git a/loop.c b/loop.c
index 46772aa..505e244 100644
--- a/loop.c
+++ b/loop.c
@@ -41,6 +41,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/socket.h>
 #include <fcntl.h>
 
 #ifdef EVENT_V2