diff -Naurp libraw1394-1.3.0/juju/raw1394-iso.c libraw1394-1.3.0.fix/juju/raw1394-iso.c
--- libraw1394-1.3.0/juju/raw1394-iso.c	2008-04-28 13:57:30.000000000 -0400
+++ libraw1394-1.3.0.fix/juju/raw1394-iso.c	2008-04-28 14:06:21.000000000 -0400
@@ -421,7 +421,7 @@ iso_init(raw1394handle_t handle, int typ
 	}
 
 	handle->iso.buffer =
-		mmap(NULL, buf_packets * max_packet_size,
+		mmap(NULL, buf_packets * handle->iso.max_packet_size,
 		     prot, MAP_SHARED, handle->iso.fd, 0);
 
 	if (handle->iso.buffer == MAP_FAILED) {
@@ -432,7 +432,7 @@ iso_init(raw1394handle_t handle, int typ
 	}
 
 	handle->iso.buffer_end = handle->iso.buffer + 
-		buf_packets * max_packet_size;
+		buf_packets * handle->iso.max_packet_size;
 	handle->iso.head = handle->iso.buffer;
 	handle->iso.tail = handle->iso.buffer;
 	handle->iso.first_payload = handle->iso.buffer;