diff --git a/examples/shrpx_client_handler.cc b/examples/shrpx_client_handler.cc
index 6fe2eea..73c82fb 100644
--- a/examples/shrpx_client_handler.cc
+++ b/examples/shrpx_client_handler.cc
@@ -24,6 +24,7 @@
  */
 #include "shrpx_client_handler.h"
 
+#include <unistd.h>
 #include <cerrno>
 
 #include "shrpx_upstream.h"
diff --git a/lib/includes/spdylay/spdylay.h b/lib/includes/spdylay/spdylay.h
index c2f1494..30d6217 100644
--- a/lib/includes/spdylay/spdylay.h
+++ b/lib/includes/spdylay/spdylay.h
@@ -32,7 +32,6 @@ extern "C" {
 #include <stdlib.h>
 #include <stdint.h>
 #include <sys/types.h>
-#include <zlib.h>
 
 #include <spdylay/spdylayver.h>