diff --git a/src/lib/encrypter.c b/src/lib/encrypter.c
index cba7b64..39c973b 100644
--- a/src/lib/encrypter.c
+++ b/src/lib/encrypter.c
@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/time.h>
-#include <unistd.h>
 
 #include <why2/flags.h>
 #include <why2/misc.h>