diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index c839b3e..193bbb6 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -462,7 +462,7 @@
       // _GLIBCXX_DEBUG checks strict weak ordering, which involves comparing
       // an object with itself.
 #ifndef _GLIBCXX_DEBUG
-      LLVM_UNREACHABLE("Predecessor appears twice");
+      llvm_unreachable("Predecessor appears twice");
 #endif
       return false;
     }