diff --git a/mlir/include/mlir/IR/StandardTypes.h b/mlir/include/mlir/IR/StandardTypes.h
index 5380668b590132..1ac24359cbb624 100644
--- a/mlir/include/mlir/IR/StandardTypes.h
+++ b/mlir/include/mlir/IR/StandardTypes.h
@@ -564,7 +564,6 @@ class MemRefType : public Type::TypeBase<MemRefType, BaseMemRefType,
   // TODO: merge these two special values in a single one used everywhere.
   // Unfortunately, uses of `-1` have crept deep into the codebase now and are
   // hard to track.
-  static constexpr int64_t kDynamicSize = -1;
   static int64_t getDynamicStrideOrOffset() {
     return ShapedType::kDynamicStrideOrOffset;
   }