diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index a108c32..6fe1315 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -277,7 +277,8 @@ static int mmio_print_line(struct trace_iterator *iter)
 	case TRACE_PRINT:
 		return mmio_print_mark(iter);
 	default:
-		return 1; /* ignore unknown entries */
+		return 0; /* ignore unknown entries whithout consuming */
 	}
 }