diff --git a/include/trace/events/psi.h b/include/trace/events/psi.h
index 7563baaba40a..452173077e2b 100644
--- a/include/trace/events/psi.h
+++ b/include/trace/events/psi.h
@@ -61,7 +61,7 @@ TRACE_EVENT(psi_event,
 		__entry->threshold = threshold;
 	),
 
-	TP_printk("State: %d Threshold: %#llx",
+	TP_printk("State: %d Threshold: %#llu ns",
 		__entry->state, __entry->threshold
 	)
 );