diff --git a/src/runtime/NEON/functions/NEOpticalFlow.cpp b/src/runtime/NEON/functions/NEOpticalFlow.cpp
index e90d8f6..db77629 100644
--- a/src/runtime/NEON/functions/NEOpticalFlow.cpp
+++ b/src/runtime/NEON/functions/NEOpticalFlow.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -121,7 +121,7 @@
 {
     ARM_COMPUTE_ERROR_ON_MSG(_num_levels == 0, "Unconfigured function");
 
-    _memory_group.acquire();
+    MemoryGroupResourceScope scope_mg(_memory_group);
 
     for(unsigned int level = _num_levels; level > 0; --level)
     {
@@ -131,6 +131,4 @@
         // Run Lucas-Kanade kernel
         NEScheduler::get().schedule(_kernel_tracker.get() + level - 1, Window::DimX);
     }
-
-    _memory_group.release();
 }