diff --git a/tools/yuvcmp.c b/tools/yuvcmp.c
index 11585f9b4c..65b1794d07 100644
--- a/tools/yuvcmp.c
+++ b/tools/yuvcmp.c
@@ -9,8 +9,10 @@
 #include <stdio.h>
 #include <sys/stat.h>
 #include <fcntl.h>
-#include <unistd.h>
 
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 
 int
 main(int argc, char **argv)