diff --git a/lib/Target/Target.td b/lib/Target/Target.td
index c05d3faaad5..2aaa6f75d9d 100644
--- a/lib/Target/Target.td
+++ b/lib/Target/Target.td
@@ -117,6 +117,7 @@ class Instruction {
   // instruction.
   bit isReturn     = 0;     // Is this instruction a return instruction?
   bit isBranch     = 0;     // Is this instruction a branch instruction?
+  bit isBarrier    = 0;     // Can control flow fall through this instruction?
   bit isCall       = 0;     // Is this instruction a call instruction?
   bit isTwoAddress = 0;     // Is this a two address instruction?
   bit isTerminator = 0;     // Is this part of the terminator for a basic block?