diff --git a/misc/factor.vim.fgen b/misc/factor.vim.fgen
index af1e9e600a..1659d1897e 100644
--- a/misc/factor.vim.fgen
+++ b/misc/factor.vim.fgen
@@ -41,12 +41,12 @@ syn match factorComment /\<! .*/ contains=factorTodo
 
 syn cluster factorDefnContents contains=@factorCluster,factorStackEffect,factorArray0,factorQuotation0
 
-syn region factorDefn matchgroup=factorDefnDelims start=/\<\(MACRO\|MEMO\|:\)\?:\s\+\S\+\>/ end=/\<;\>/ contains=@factorDefnContents
+syn region factorDefn matchgroup=factorDefnDelims start=/\<\(MACRO\|MACRO::\|MEMO:\|MEMO::\|:\|::\)\?:\s\+\S\+\>/ end=/\<;\>/ contains=@factorDefnContents
 syn region factorMethod matchgroup=factorMethodDelims start=/\<M:\s\+\S\+\s\+\S\+\>/ end=/\<;\>/ contains=@factorDefnContents
 syn region factorGeneric matchgroup=factorGenericDelims start=/\<GENERIC:\s\+\S\+\>/ end=/$/ contains=factorStackEffect
 syn region factorGenericN matchgroup=factorGenericNDelims start=/\<GENERIC#\s\+\S\+\s\+\d\+\>/ end=/$/ contains=factorStackEffect
 
-syn region factorPrivateDefn matchgroup=factorPrivateDefnDelims start=/\<\(MACRO\|MEMO\|:\)\?:\s\+\S\+\>/ end=/\<;\>/ contains=@factorDefnContents contained
+syn region factorPrivateDefn matchgroup=factorPrivateDefnDelims start=/\<\(MACRO\|MACRO::\|MEMO:\|MEMO::\|:\|::\)\?:\s\+\S\+\>/ end=/\<;\>/ contains=@factorDefnContents contained
 syn region factorPrivateMethod matchgroup=factorPrivateMethodDelims start=/\<M:\s\+\S\+\s\+\S\+\>/ end=/\<;\>/ contains=@factorDefnContents contained
 syn region factorPGeneric matchgroup=factorPGenericDelims start=/\<GENERIC:\s\+\S\+\>/ end=/$/ contains=factorStackEffect contained
 syn region factorPGenericN matchgroup=factorPGenericNDelims start=/\<GENERIC#\s\+\S\+\s\+\d\+\>/ end=/$/ contains=factorStackEffect