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-rw-r--r--Makefile.doc2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile.doc b/Makefile.doc
index 5a02817e5..5e955a261 100644
--- a/Makefile.doc
+++ b/Makefile.doc
@@ -67,7 +67,7 @@ HIDEBIBTEXINFO=| grep -v "^A level-1 auxiliary file"
SHOWMAKEINDEXERROR=egrep "^!! Input index error|^** Input style error|^ --"
# Empty subsection levels in faq are on purpose
-HEVEAFAQFILTER=|& grep -v "^Warning: List with no item"
+HEVEAFAQFILTER=2>&1 | grep -v "^Warning: List with no item"
######################################################################
# Common