diff --git a/configs/example/arm/fs_bigLITTLE.py b/configs/example/arm/fs_bigLITTLE.py
index 678b038..539d1e7 100644
--- a/configs/example/arm/fs_bigLITTLE.py
+++ b/configs/example/arm/fs_bigLITTLE.py
@@ -242,7 +242,7 @@
 
     # Figure out the memory mode
     if options.big_cpus > 0 and options.little_cpus > 0 and \
-       system.littleCluster.memoryMode() != system.littleCluster.memoryMode():
+       system.bigCluster.memoryMode() != system.littleCluster.memoryMode():
         m5.util.panic("Memory mode missmatch among CPU clusters")