diff --git a/mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp b/mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp
--- a/mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp
+++ b/mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp
@@ -1760,7 +1760,7 @@
                                 static_cast<int32_t>(outputs.size())}));
   result.addAttribute(getIteratorTypesAttrName(), iteratorTypes);
 
-  if (distributionTypes.hasValue())
+  if (distributionTypes.hasValue() && distributionTypes->getAsOpaquePointer())
     result.addAttribute(getDistributionTypesAttrName(),
                         distributionTypes.getValue());