diff --git a/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp b/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp
index 793eec732aa03..ea68b1ad572c3 100644
--- a/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp
@@ -1946,12 +1946,6 @@ vectorizeAsTensorUnpackOp(RewriterBase &rewriter, linalg::UnPackOp unpackOp,
   vector::ShapeCastOp shapeCastOp = vector::ShapeCastOp::create(
       rewriter, loc, vecCollapsedType, transposeOp->getResult(0));
 
-  // writeVectorSizes had to match the shapecast shape for dynamic sizes,
-  // otherwise the validator complains that the mask size is invalid.
-  SmallVector<int64_t> writeVectorSizes(
-      unpackOp.getDestType().hasStaticShape()
-          ? vectorSizes
-          : shapeCastOp.getResultVectorType().getShape());
   Operation *write = createWriteOrMaskedWrite(
       rewriter, loc, shapeCastOp.getResult(), unpackOp.getDest(),
       /*writeIndices=*/{}, useInBoundsInsteadOfMasking);