diff --git a/meta/features.ptl b/meta/features.ptl
index 52f5c54..2ed8dec 100644
--- a/meta/features.ptl
+++ b/meta/features.ptl
@@ -215,8 +215,10 @@ export : define [apply para glyphList] : begin
 					chain-rule (stick ~> [lsx 'fj']) less # -<, =<
 						:> only {'hask'}
 					
-					chain-rule ({'colon'} ~> {'colon.mid'}) {'greater' 'less' 'hyphen' 'equal' 'plus'} # :> :- := :< :+
-					chain-rule {'greater' 'less' 'hyphen' 'equal' 'plus'} ({'colon'} ~> {'colon.mid'}) # <: >: -: =: +:
+					chain-rule ({'colon'} ~> {'colon.mid'}) {'greater' 'less' 'hyphen' 'equal' 'plus' 'colon.mid'} # :> :- := :< :+
+					chain-rule ({'colon'} ~> {'colon.mid'}) ({'colon'} ~> {'colon.mid'}) {'greater' 'less' 'hyphen' 'equal' 'plus' 'colon.mid'} # ::> ::- ::= ::< ::+
+					chain-rule ({'colon'} ~> {'colon.mid'}) ({'colon'} ~> {'colon.mid'}) ({'colon'} ~> {'colon.mid'}) {'greater' 'less' 'hyphen' 'equal' 'plus' 'colon.mid'} # :::> :::- :::= :::< :::+
+					chain-rule {'greater' 'less' 'hyphen' 'equal' 'plus' 'colon.mid'} ({'colon'} ~> {'colon.mid'}) # <: >: -: =: +:
 		
 		#opbd
 		local fwclose {'fwlcloseDoubleQuote' 'fwlcloseSingleQuote' 'dwlcjkSingleQuoteRight' 'dwlcjkDoubleQuoteRight' 'dwlparenRight'}