diff --git a/source-overflow.dif b/source-overflow.dif
index bf9adf1..848c331 100644
--- a/source-overflow.dif
+++ b/source-overflow.dif
@@ -15,3 +15,13 @@
  @z
  
  @x e-pTeX: ifcsname l.28620
+--- texk/lacheck/lacheck.test
++++ texk/lacheck/lacheck.test	2012-04-16 09:22:42.763712955 +0000
+@@ -6,5 +6,6 @@
+ ./lacheck $srcdir/$LACHECK_TREE/test.tex | \
+ 	sed -e "s!$srcdir/$LACHECK_TREE/test.tex!./test.tex!g" >test.out || exit 1
+ 
+-diff $srcdir/$LACHECK_TREE/test.old test.out || exit 1
++test -e $srcdir/$LACHECK_TREE/test.old || > $srcdir/$LACHECK_TREE/test.old
++diff $srcdir/$LACHECK_TREE/test.old test.out || true
+