diff --git a/libc/include/fcntl.h b/libc/include/fcntl.h
index c49dbd0..b8824d9 100644
--- a/libc/include/fcntl.h
+++ b/libc/include/fcntl.h
@@ -32,6 +32,7 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <linux/fadvise.h>
+#include <linux/falloc.h>
 #include <linux/fcntl.h>
 #include <linux/stat.h>
 #include <linux/uio.h>