diff --git a/Add-Lua.sh b/Add-Lua.sh
index dce7a83..afa3756 100755
--- a/Add-Lua.sh
+++ b/Add-Lua.sh
@@ -64,6 +64,9 @@ cat >AdditionalLanguages.plist <<EOF
 </dict>
 </plist>
 EOF
+# Delete existing language if present
+#
+$PLISTBUDDY "$DVTFOUNDATION_PATH/DVTFoundation.xcplugindata" -c 'Delete plug-in:extensions:Xcode.SourceCodeLanguage.Lua'
 
 # Now merge in the additonal languages to DVTFoundation.xcplugindata
 #