diff --git a/proc.h b/proc.h
index 7d97dfa..8799668 100644
--- a/proc.h
+++ b/proc.h
@@ -48,7 +48,6 @@ struct proc {
 // Process memory is laid out contiguously, low addresses first:
 //   text
 //   original data and bss
-//   invalid page
 //   fixed-size stack
 //   expandable heap