diff --git a/llvm/test/Scripts/notcast b/llvm/test/Scripts/notcast
index 5fd69de68937..6d56580c8fc9 100755
--- a/llvm/test/Scripts/notcast
+++ b/llvm/test/Scripts/notcast
@@ -10,7 +10,7 @@
 #    prepat  - optionally allow a regular expression to go at the start
 #
 
-if grep "$2"'\(\([sz]ext\)\|\(trunc\)\|\(fpto[us]i\)\|\([us]itofp\)\|\(bitcast\)\|\(fpext\)\|\(fptrunc\)\|\(ptrtoint\)\|\(inttoptr\)\)'"$1"
+if grep "$2"'\(\([sz]ext\)\|\(trunc\)\|\(fpto[us]i\)\|\([us]itofp\)\|\(bitcast\)\|\(fpext\)\|\(fptrunc\)\|\(ptrtoint\)\|\(inttoptr\)\|\(cast\)\)'"$1"
 then exit 1
 else exit 0
 fi