diff --git a/include/debug_ll.h b/include/debug_ll.h
index b0eb7cd..5047516 100644
--- a/include/debug_ll.h
+++ b/include/debug_ll.h
@@ -42,7 +42,7 @@
 {
 	int i; unsigned char ch;
 
-	for (i = 8; i--; ) {
+	for (i = sizeof(unsigned long) * 2; i--; ) {
 		ch = ((value >> (i * 4)) & 0xf);
 		ch += (ch >= 10) ? 'a' - 10 : '0';
 		putc_ll(ch);