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-rw-r--r--syntax/basic/doc.vim2
1 files changed, 1 insertions, 1 deletions
diff --git a/syntax/basic/doc.vim b/syntax/basic/doc.vim
index dfba989a..44c94ef6 100644
--- a/syntax/basic/doc.vim
+++ b/syntax/basic/doc.vim
@@ -77,7 +77,7 @@ syntax region typescriptDocLinkTag contained matchgroup=typescriptDo
syntax cluster typescriptDocs contains=typescriptDocParamType,typescriptDocNamedParamType,typescriptDocParam
-if main_syntax == "typescript"
+if exists("main_syntax") && main_syntax == "typescript"
syntax sync clear
syntax sync ccomment typescriptComment minlines=200
endif