diff --git a/bolt/lib/Passes/ValidateInternalCalls.cpp b/bolt/lib/Passes/ValidateInternalCalls.cpp
--- a/bolt/lib/Passes/ValidateInternalCalls.cpp
+++ b/bolt/lib/Passes/ValidateInternalCalls.cpp
@@ -106,6 +106,7 @@
         // block.
         std::vector<std::unique_ptr<BinaryBasicBlock>> NewBBs;
         NewBBs.emplace_back(Function.createBasicBlock());
+        NewBBs.back()->setOffset(0);
         NewBBs.back()->addInstructions(MovedInsts.begin(), MovedInsts.end());
         BB.moveAllSuccessorsTo(NewBBs.back().get());
         Function.insertBasicBlocks(&BB, std::move(NewBBs));