diff --git a/main.c b/main.c
index 5781322..cfab55f 100644
--- a/main.c
+++ b/main.c
@@ -127,7 +127,7 @@ process0()
   iunlock(p0->cwd);
 
   // dummy user memory to make copyproc() happy
-  p0->sz = 4 * PAGE;
+  p0->sz = PAGE;
   p0->mem = kalloc(p0->sz);
 
   // fake a trap frame as if a user process had made a system