Index: boot/generic/src/printf_core.c
===================================================================
--- boot/generic/src/printf_core.c	(revision e330da6e8c9b0dc3c32eed16c06b64b13f0a6963)
+++ boot/generic/src/printf_core.c	(revision 907d91a80c0650e86aa38b2f40556a3b07ed7013)
@@ -611,4 +611,7 @@
 				else
 					qualifier = PrintfQualifierLongLong;
+				i = nxt;
+				uc = str_decode(fmt, &nxt, STR_NO_LIMIT);
+				break;
 			case 'h':
 				/* Char or short */