diff --git a/llvm/include/llvm/IR/Instructions.h b/llvm/include/llvm/IR/Instructions.h
index 650746c02838..4aa34b07773a 100644
--- a/llvm/include/llvm/IR/Instructions.h
+++ b/llvm/include/llvm/IR/Instructions.h
@@ -2592,6 +2592,7 @@ class PHINode : public Instruction {
           BasicBlock *InsertAtEnd)
     : Instruction(Ty, Instruction::PHI, nullptr, 0, InsertAtEnd),
       ReservedSpace(NumReservedValues) {
+    assert(!Ty->isTokenTy() && "PHI nodes cannot have token type!");
     setName(NameStr);
     allocHungoffUses(ReservedSpace);
   }