diff --git a/src/runtime/NEON/functions/NESobel5x5.cpp b/src/runtime/NEON/functions/NESobel5x5.cpp
index d8f4eda..2ddfee5 100644
--- a/src/runtime/NEON/functions/NESobel5x5.cpp
+++ b/src/runtime/NEON/functions/NESobel5x5.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -81,10 +81,8 @@
 {
     NEScheduler::get().schedule(&_border_handler, Window::DimZ);
 
-    _memory_group.acquire();
+    MemoryGroupResourceScope scope_mg(_memory_group);
 
     NEScheduler::get().schedule(&_sobel_hor, Window::DimY);
     NEScheduler::get().schedule(&_sobel_vert, Window::DimY);
-
-    _memory_group.release();
 }