diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 96c9c0b33423..87757eabbb08 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3985,6 +3985,8 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
 				break;
 			}
 		}
+		if (!flag)
+			trace_seq_printf(s, "0x%llx", val);
 		break;
 	case PRINT_HEX:
 	case PRINT_HEX_STR: