return back unistd.h

diff --git a/blinker.c b/blinker.c
index d44dfe9..7127eda 100644 (file)
--- a/blinker.c
+++ b/blinker.c
@@ -27,6 +27,7 @@
  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <unistd.h>
 #include <string.h>
 #include <errno.h>
 #include <fcntl.h>