diff --git a/ot_iovec.c b/ot_iovec.c
index c50003c..fec3912 100644
--- a/ot_iovec.c
+++ b/ot_iovec.c
@@ -5,7 +5,6 @@
 
 /* System */
 #include <sys/types.h>
-#include <sys/mman.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <sys/uio.h>