diff --git a/mlir/lib/Dialect/Vector/IR/VectorOps.cpp b/mlir/lib/Dialect/Vector/IR/VectorOps.cpp
--- a/mlir/lib/Dialect/Vector/IR/VectorOps.cpp
+++ b/mlir/lib/Dialect/Vector/IR/VectorOps.cpp
@@ -640,7 +640,7 @@
   auto loc = parser.getCurrentLocation();
   DictionaryAttr dictAttr;
   // TODO: Unify linalg op attribute parsing.
-  if (parser.parseAttribute(dictAttr, "_", result.attributes) ||
+  if (parser.parseAttribute(dictAttr) ||
       parser.parseOperand(lhsInfo) || parser.parseComma() ||
       parser.parseOperand(rhsInfo) || parser.parseComma() ||
       parser.parseOperand(accInfo) ||
@@ -653,7 +653,7 @@
       parser.resolveOperand(accInfo, resultType, result.operands) ||
       parser.addTypeToList(resultType, result.types))
     return failure();
-  result.attributes.assign(dictAttr.getValue().begin(),
+  result.attributes.append(dictAttr.getValue().begin(),
                            dictAttr.getValue().end());
 
   // Convert array of string into an array of IteratyType enums. This is needed,
diff --git a/mlir/test/Dialect/Vector/ops.mlir b/mlir/test/Dialect/Vector/ops.mlir
--- a/mlir/test/Dialect/Vector/ops.mlir
+++ b/mlir/test/Dialect/Vector/ops.mlir
@@ -291,6 +291,18 @@
   return %0 : f32
 }
 
+// CHECK-LABEL: @contraction_extra_attrs
+func.func @contraction_extra_attrs(%arg0: vector<10xf32>, %arg1: vector<10xf32>) -> f32 {
+  // CHECK:      %[[C0:.*]] = arith.constant 0.000000e+00 : f32
+  %f0 = arith.constant 0.0: f32
+  // CHECK:      %[[X:.*]] = vector.contract {indexing_maps = [#{{.*}}, #{{.*}}, #{{.*}}], iterator_types = ["reduction"], kind = #vector.kind<add>} %{{.*}}, %{{.*}}, %[[C0]] {first_attr = 1 : i32, second_attr = "string"} : vector<10xf32>, vector<10xf32> into f32
+  %0 = vector.contract #contraction_to_scalar_trait %arg0, %arg1, %f0
+    {first_attr = 1 : i32, second_attr = "string"}
+    : vector<10xf32>, vector<10xf32> into f32
+  // CHECK:      return %[[X]] : f32
+  return %0 : f32
+}
+
 #contraction_to_scalar_max_accesses = [
   affine_map<(i) -> (i)>,
   affine_map<(i) -> (i)>,