diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -80,7 +80,8 @@
 def ClauseDefaultAttr : EnumAttr<OpenMP_Dialect, ClauseDefault,
                                  "clause_default">;
 
-def ParallelOp : OpenMP_Op<"parallel", [AttrSizedOperandSegments,
+def ParallelOp : OpenMP_Op<"parallel", [AutomaticAllocationScope, 
+                                        AttrSizedOperandSegments,
                  DeclareOpInterfaceMethods<OutlineableOpenMPOpInterface>]> {
   let summary = "parallel construct";
   let description = [{
diff --git a/mlir/include/mlir/Dialect/SCF/SCFOps.td b/mlir/include/mlir/Dialect/SCF/SCFOps.td
--- a/mlir/include/mlir/Dialect/SCF/SCFOps.td
+++ b/mlir/include/mlir/Dialect/SCF/SCFOps.td
@@ -404,7 +404,8 @@
 }
 
 def ParallelOp : SCF_Op<"parallel",
-    [AttrSizedOperandSegments,
+    [AutomaticAllocationScope,
+     AttrSizedOperandSegments,
      DeclareOpInterfaceMethods<LoopLikeOpInterface>,
      RecursiveSideEffects,
      SingleBlockImplicitTerminator<"scf::YieldOp">]> {