diff --git a/contrib/ispc.vim b/contrib/ispc.vim
index 1747bdff..bd1d2277 100644
--- a/contrib/ispc.vim
+++ b/contrib/ispc.vim
@@ -16,7 +16,7 @@ unlet b:current_syntax
 syn keyword	ispcStatement	cbreak ccontinue creturn launch print reference soa sync
 syn keyword	ispcConditional	cif
 syn keyword	ispcRepeat	cdo cfor cwhile foreach foreach_tiled foreach_unique foreach_active
-syn keyword	ispcBuiltin	programCount programIndex taskCount taskIndex taskIndex0 taskIndex1 taskIndex2
+syn keyword	ispcBuiltin	programCount programIndex taskCount taskCount0 taskCount1 taskCount3 taskIndex taskIndex0 taskIndex1 taskIndex2
 syn keyword	ispcType	export uniform varying int8 int16 int32 int64 task
 syn keyword	ispcOperator	operator