diff --git a/lib/Analysis/IPA/Andersens.cpp b/lib/Analysis/IPA/Andersens.cpp
index 9ade25e1eed..c473b0e3d2a 100644
--- a/lib/Analysis/IPA/Andersens.cpp
+++ b/lib/Analysis/IPA/Andersens.cpp
@@ -652,6 +652,7 @@ void Andersens::visitInstruction(Instruction &I) {
   case Instruction::Br:
   case Instruction::Switch:
   case Instruction::Unwind:
+  case Instruction::Unreachable:
   case Instruction::Free:
   case Instruction::Shl:
   case Instruction::Shr: