diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp
index 5cfeeb6..0320aff 100644
--- a/lib/CodeGen/MachineBasicBlock.cpp
+++ b/lib/CodeGen/MachineBasicBlock.cpp
@@ -285,7 +285,8 @@
     // Scan the operands of this machine instruction, replacing any uses of Old
     // with New.
     for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
-      if (I->getOperand(i).isMBB() && I->getOperand(i).getMBB() == Old)
+      if (I->getOperand(i).isMachineBasicBlock() &&
+          I->getOperand(i).getMBB() == Old)
         I->getOperand(i).setMBB(New);
   }