diff --git a/lang/cem/libcc/mon/brk.e b/lang/cem/libcc/mon/brk.e
index 1c2b1303a..9e4d44800 100644
--- a/lang/cem/libcc/mon/brk.e
+++ b/lang/cem/libcc/mon/brk.e
@@ -5,6 +5,6 @@
  lal 0
  loi EM_PSIZE
  str 2          ; The - possibly - occurring traps should be caught
- loc 0
- ret EM_WSIZE
+ zer EM_PSIZE
+ ret EM_PSIZE
  end