diff --git a/libio/fileops.c b/libio/fileops.c
index b997e4b..297b478 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -32,6 +32,7 @@
 #include "libioP.h"
 #include <assert.h>
 #include <fcntl.h>
+#include <sys/mman.h>
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/libio/iopopen.c b/libio/iopopen.c
index ac39485..53da776 100644
--- a/libio/iopopen.c
+++ b/libio/iopopen.c
@@ -29,11 +29,11 @@
 # define _POSIX_SOURCE
 #endif
 #include "libioP.h"
+#include <fcntl.h>
 #include <signal.h>
 #include <unistd.h>
 #include <stdlib.h>
 #ifdef _LIBC
-# include <unistd.h>
 # include <shlib-compat.h>
 # include <not-cancel.h>
 #endif