diff --git a/performance.py b/performance.py
index 97c6554..e377898 100755
--- a/performance.py
+++ b/performance.py
@@ -144,7 +144,7 @@
 def main(user_args):
     if user_args.generate_memory:
         # Export ARMClang v6.13 to ENV PATH
-        os.environ['PATH'] += os.pathsep + os.getenv('ARMCLANG_6_18_PATH')
+        os.environ['PATH'] += os.pathsep + os.getenv('ARMCLANG_6_21_PATH')
         if os.getenv('CONFIG_NAME') in mem_configs.keys():
             print('Configuration ' + os.getenv('CONFIG_NAME') + ' is a reference')