diff --git a/lib/krb5/send_to_kdc.c b/lib/krb5/send_to_kdc.c
index 7ba08f133..f063c2874 100644
--- a/lib/krb5/send_to_kdc.c
+++ b/lib/krb5/send_to_kdc.c
@@ -74,8 +74,8 @@ send_and_recv (int fd,
 		 return 0;
 
 	     recv->data = realloc(recv->data, recv->length + nbytes);
-	     ret = recvfrom (fd, recv->data + recv->length, nbytes, 
-			     0, NULL, &len);
+	     ret = recvfrom (fd, (char *)recv->data + recv->length,
+			     nbytes, 0, NULL, &len);
 	     if (ret < 0) {
 		 free (recv->data);
 		 return -1;