diff --git a/runtime/syntax/yaml.vim b/runtime/syntax/yaml.vim
index 626dc8a..49f7d04 100644
--- a/runtime/syntax/yaml.vim
+++ b/runtime/syntax/yaml.vim
@@ -3,6 +3,7 @@
 " Maintainer:       Nikolai Pavlov <zyx.vim@gmail.com>
 " First author:     Nikolai Weibull <now@bitwi.se>
 " Latest Revision:  2015-03-28
+" 		    removed duplicate yamlKeyValueDelimiter (pull #4799)
 
 if exists('b:current_syntax')
     finish
@@ -150,7 +151,6 @@
 syn match yamlBlockMappingMerge /<<\ze\s*:\%(\s\|$\)/ nextgroup=yamlKeyValueDelimiter contained
 
 syn match   yamlKeyValueDelimiter /\s*:/ contained
-syn match   yamlKeyValueDelimiter /\s*:/ contained
 
 syn cluster yamlScalarWithSpecials contains=yamlPlainScalar,yamlBlockMappingKey,yamlFlowMappingKey