diff --git a/flang/include/flang/Optimizer/Dialect/FIROps.td b/flang/include/flang/Optimizer/Dialect/FIROps.td
--- a/flang/include/flang/Optimizer/Dialect/FIROps.td
+++ b/flang/include/flang/Optimizer/Dialect/FIROps.td
@@ -1773,6 +1773,8 @@
   }];
 
   let hasVerifier = 1;
+
+  let builders = [OpBuilder<(ins "mlir::ValueRange":$extents)>];
 }
 
 def fir_ShapeShiftOp : fir_Op<"shape_shift", [NoMemoryEffect]> {
diff --git a/flang/lib/Lower/ConvertExpr.cpp b/flang/lib/Lower/ConvertExpr.cpp
--- a/flang/lib/Lower/ConvertExpr.cpp
+++ b/flang/lib/Lower/ConvertExpr.cpp
@@ -4375,8 +4375,7 @@
     llvm::SmallVector<mlir::Value> idxShape;
     for (auto s : shape)
       idxShape.push_back(builder.createConvert(loc, idxTy, s));
-    auto shapeTy = fir::ShapeType::get(builder.getContext(), idxShape.size());
-    return builder.create<fir::ShapeOp>(loc, shapeTy, idxShape);
+    return builder.create<fir::ShapeOp>(loc, idxShape);
   }
 
   fir::ShapeOp genShapeOp(llvm::ArrayRef<mlir::Value> shape) {
diff --git a/flang/lib/Optimizer/Builder/FIRBuilder.cpp b/flang/lib/Optimizer/Builder/FIRBuilder.cpp
--- a/flang/lib/Optimizer/Builder/FIRBuilder.cpp
+++ b/flang/lib/Optimizer/Builder/FIRBuilder.cpp
@@ -379,8 +379,7 @@
 
 mlir::Value fir::FirOpBuilder::genShape(mlir::Location loc,
                                         llvm::ArrayRef<mlir::Value> exts) {
-  auto shapeType = fir::ShapeType::get(getContext(), exts.size());
-  return create<fir::ShapeOp>(loc, shapeType, exts);
+  return create<fir::ShapeOp>(loc, exts);
 }
 
 mlir::Value fir::FirOpBuilder::genShape(mlir::Location loc,
diff --git a/flang/lib/Optimizer/Builder/MutableBox.cpp b/flang/lib/Optimizer/Builder/MutableBox.cpp
--- a/flang/lib/Optimizer/Builder/MutableBox.cpp
+++ b/flang/lib/Optimizer/Builder/MutableBox.cpp
@@ -34,9 +34,7 @@
   mlir::Value shape;
   if (!extents.empty()) {
     if (lbounds.empty()) {
-      auto shapeType =
-          fir::ShapeType::get(builder.getContext(), extents.size());
-      shape = builder.create<fir::ShapeOp>(loc, shapeType, extents);
+      shape = builder.create<fir::ShapeOp>(loc, extents);
     } else {
       llvm::SmallVector<mlir::Value> shapeShiftBounds;
       for (auto [lb, extent] : llvm::zip(lbounds, extents)) {
diff --git a/flang/lib/Optimizer/Dialect/FIROps.cpp b/flang/lib/Optimizer/Dialect/FIROps.cpp
--- a/flang/lib/Optimizer/Dialect/FIROps.cpp
+++ b/flang/lib/Optimizer/Dialect/FIROps.cpp
@@ -3086,6 +3086,12 @@
   return mlir::success();
 }
 
+void fir::ShapeOp::build(mlir::OpBuilder &builder, mlir::OperationState &result,
+                         mlir::ValueRange extents) {
+  auto type = fir::ShapeType::get(builder.getContext(), extents.size());
+  build(builder, result, type, extents);
+}
+
 //===----------------------------------------------------------------------===//
 // ShapeShiftOp
 //===----------------------------------------------------------------------===//
diff --git a/flang/unittests/Optimizer/FortranVariableTest.cpp b/flang/unittests/Optimizer/FortranVariableTest.cpp
--- a/flang/unittests/Optimizer/FortranVariableTest.cpp
+++ b/flang/unittests/Optimizer/FortranVariableTest.cpp
@@ -36,8 +36,7 @@
   }
 
   mlir::Value createShape(llvm::ArrayRef<mlir::Value> extents) {
-    mlir::Type shapeType = fir::ShapeType::get(&context, extents.size());
-    return builder->create<fir::ShapeOp>(getLoc(), shapeType, extents);
+    return builder->create<fir::ShapeOp>(getLoc(), extents);
   }
   mlir::MLIRContext context;
   std::unique_ptr<mlir::OpBuilder> builder;