diff --git a/src/sample.c b/src/sample.c
index 1278ef938..870f5dcd8 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -958,6 +958,17 @@ static int c_int2bin(struct sample *smp)
 	return 1;
 }
 
+static int c_bool2bin(struct sample *smp)
+{
+	struct buffer *chk = get_trash_chunk();
+
+	*(unsigned long long int *)chk->area = my_htonll(!!smp->data.u.sint);
+	chk->data = 8;
+	smp->data.u.str = *chk;
+	smp->data.type = SMP_T_BIN;
+	return 1;
+}
+
 
 /*****************************************************************/
 /*      Sample casts matrix:                                     */
@@ -968,7 +979,7 @@ static int c_int2bin(struct sample *smp)
 sample_cast_fct sample_casts[SMP_TYPES][SMP_TYPES] = {
 /*            to:  ANY     BOOL       SINT       ADDR        IPV4      IPV6        STR         BIN         METH */
 /* from:  ANY */ { c_none, c_none,    c_none,    c_none,     c_none,   c_none,     c_none,     c_none,     c_none,     },
-/*       BOOL */ { c_none, c_none,    c_none,    NULL,       NULL,     NULL,       c_int2str,  NULL,       NULL,       },
+/*       BOOL */ { c_none, c_none,    c_none,    NULL,       NULL,     NULL,       c_int2str,  c_bool2bin, NULL,       },
 /*       SINT */ { c_none, c_none,    c_none,    c_int2ip,   c_int2ip, c_int2ipv6, c_int2str,  c_int2bin,  NULL,       },
 /*       ADDR */ { c_none, NULL,      NULL,      NULL,       NULL,     NULL,       NULL,       NULL,       NULL,       },
 /*       IPV4 */ { c_none, NULL,      c_ip2int,  c_none,     c_none,   c_ip2ipv6,  c_ip2str,   c_addr2bin, NULL,       },