diff --git a/sanityCheck b/sanityCheck
index eaf44496fcfb1d1c5c32abcf01436e2ddd91969d..9945eb4e6534082ac884326f56280e4b36108203 100755
--- a/sanityCheck
+++ b/sanityCheck
@@ -77,7 +77,7 @@ $GREP -e "<<[a-zA-Z]\([^>\"]\|[^>]>[^>]\|\"[^\"]*\"\)* [a-zA-Z]\+ * =" -- src/*.
 # Check for missing command, e.g.  <<foo =
 $GREP -e "<<[a-zA-Z]* = *" -- src/*.tw | myprint "BadCommand"
 # Check for duplicate words, e.g. with with
-$GREP -e  " \(\b[a-zA-Z][a-zA-Z]\+\) \1\b " --and --not -e " her her " --and --not -e " you you " --and --not -e " New New " --and --not -e " that that " --and --not -e " in in " --and --not -e " is is " -- 'src/*' | myprint "Duplicate words"
+$GREP -e  " \(\b[a-zA-Z][a-zA-Z]\+\) \1\b " --and --not -e " her her " --and --not -e " you you " --and --not -e " New New " --and --not -e "Slave Slave " --and --not -e " that that " --and --not -e " in in " --and --not -e " is is " -- 'src/*' | myprint "Duplicate words"
 # Check for obsolete SugarCube macros
 $GREP -E "<<display |<<click|<<.*\.contains" -- src/*.tw | myprint "ObsoleteMacro"
 # Check for double articles