diff --git a/runtime/syntax/xdefaults.vim b/runtime/syntax/xdefaults.vim
index d7f1172..5e38952 100644
--- a/runtime/syntax/xdefaults.vim
+++ b/runtime/syntax/xdefaults.vim
@@ -33,7 +33,7 @@
 
 
 " syn region  xdefaultsLabel   start=+^[^:]\{-}:+he=e-1 skip=+\\+ end="$"
-syn match   xdefaultsLabel   +[^:]\{-}:+he=e-1                       contains=xdefaultsPunct,xdefaultsSpecial,xdefaultsLineEnd
+syn match   xdefaultsLabel   +^[^:]\{-}:+he=e-1                       contains=xdefaultsPunct,xdefaultsSpecial,xdefaultsLineEnd
 syn region  xdefaultsValue   keepend start=+:+lc=1 skip=+\\+ end=+$+ contains=xdefaultsSpecial,xdefaultsLabel,xdefaultsLineEnd
 
 syn match   xdefaultsSpecial	contained +#override+
@@ -75,9 +75,9 @@
 syn region	xdefaultsIncluded	contained start=+"+ skip=+\\\\\|\\"+ end=+"+
 syn match	xdefaultsIncluded	contained "<[^>]*>"
 syn match	xdefaultsInclude	"^\s*#\s*include\>\s*["<]" contains=xdefaultsIncluded
-syn cluster	xdefaultsPreProcGroup	contains=xdefaultsPreProc,xdefaultsIncluded,xdefaultsInclude,xdefaultsDefine
-syn region	xdefaultsDefine		start="^\s*#\s*\(define\|undef\)\>" skip="\\$" end="$" contains=ALLBUT,@xdefaultsPreProcGroup,xdefaultsCommentH,xdefaultsErrorLine
-syn region	xdefaultsPreProc	start="^\s*#\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend contains=ALLBUT,@xdefaultsPreProcGroup,xdefaultsCommentH,xdefaultsErrorLine
+syn cluster	xdefaultsPreProcGroup	contains=xdefaultsPreProc,xdefaultsIncluded,xdefaultsInclude,xdefaultsDefine,xdefaultsCppOut,xdefaultsCppOut2,xdefaultsCppSkip
+syn region	xdefaultsDefine		start="^\s*#\s*\(define\|undef\)\>" skip="\\$" end="$" contains=ALLBUT,@xdefaultsPreProcGroup,xdefaultsCommentH,xdefaultsErrorLine,xdefaultsLabel,xdefaultsValue
+syn region	xdefaultsPreProc	start="^\s*#\s*\(pragma\>\|line\>\|warning\>\|warn\>\|error\>\)" skip="\\$" end="$" keepend contains=ALLBUT,@xdefaultsPreProcGroup,xdefaultsCommentH,xdefaultsErrorLine,xdefaultsLabel,xdefaultsValue