diff --git a/test/CodeGen/Hexagon/regalloc-bad-undef.mir b/test/CodeGen/Hexagon/regalloc-bad-undef.mir
index 8fed2c66da3..397ea38c5d9 100644
--- a/test/CodeGen/Hexagon/regalloc-bad-undef.mir
+++ b/test/CodeGen/Hexagon/regalloc-bad-undef.mir
@@ -66,7 +66,6 @@
 name:            main
 alignment:       2
 tracksRegLiveness: true
-tracksSubRegLiveness: true
 registers:
   - { id: 0, class: intregs }
   - { id: 1, class: intregs }