diff --git a/validator/val_secalgo.c b/validator/val_secalgo.c
index 2eb4ae578..ca308d5e0 100644
--- a/validator/val_secalgo.c
+++ b/validator/val_secalgo.c
@@ -332,7 +332,7 @@ i	 * the '44' is the total remaining length.
 	p += bnsize-r_rem;
 	memmove(p, mid, (size_t)mid_len-1);
 	p += mid_len-1;
-	*p = bnsize + s_high - s_rem;
+	*p = (uint8_t)(bnsize + s_high - s_rem);
 	p += 1;
         if(s_high) {
 		*p = 0;