diff --git a/libc/isystem/sys/time.h b/libc/isystem/sys/time.h
index 1a531ee2b..3cd4ea469 100644
--- a/libc/isystem/sys/time.h
+++ b/libc/isystem/sys/time.h
@@ -1,6 +1,7 @@
 #ifndef LIBC_ISYSTEM_SYS_TIME_H_
 #define LIBC_ISYSTEM_SYS_TIME_H_
 #include "libc/calls/struct/timeval.h"
+#include "libc/calls/struct/itimerval.h"
 #include "libc/sysv/consts/clock.h"
 #include "libc/sysv/consts/itimer.h"
 #include "libc/time/struct/timezone.h"