diff --git a/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h b/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
index 6c0d14e1470ce6..ed0c55a4cb1eba 100644
--- a/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
+++ b/llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
@@ -132,11 +132,6 @@ class ValueIDNum {
     u.s = {Block, Inst, Loc.asU64()};
   }
 
-  ValueIDNum &operator=(const ValueIDNum &Other) {
-    u.Value = Other.u.Value;
-    return *this;
-  }
-
   uint64_t getBlock() const { return u.s.BlockNo; }
   uint64_t getInst() const { return u.s.InstNo; }
   uint64_t getLoc() const { return u.s.LocNo; }