diff --git a/include/sys/types.h b/include/sys/types.h
index 1acd571..b78d9aa 100644
--- a/include/sys/types.h
+++ b/include/sys/types.h
@@ -30,7 +30,7 @@
 #define _SYS_TYPES_H_
 
 #include <sys/_types.h>
-// XXX #include <sys/select.h>
+#include <sys/select.h>
 
 #ifndef NULL
 #define NULL 0x0