1 files changed, 1 insertions, 0 deletions

diff --git a/libbb/vdprintf.c b/libbb/vdprintf.c
index a18291b3b..8c3e32a7a 100644
--- a/libbb/vdprintf.c
+++ b/libbb/vdprintf.c
@@ -26,6 +26,7 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 #include "libbb.h"