Better safe than fixing this next month

=0 or is null

Author: BlitzErik

sp_BlitzCache.sql

@@ -2607,7 +2607,7 @@ BEGIN
 	WHERE   qp.SqlHandle = ##bou_BlitzCacheProcs.SqlHandle
 	AND SPID = @@SPID
 	AND query_plan.exist('/p:QueryPlan/@NonParallelPlanReason') = 1
-	AND ##bou_BlitzCacheProcs.is_parallel = 0
+	AND (##bou_BlitzCacheProcs.is_parallel = 0 OR ##bou_BlitzCacheProcs.is_parallel IS NULL)
 	OPTION (RECOMPILE);