diff --git a/src/cpu/o3/lsq_impl.hh b/src/cpu/o3/lsq_impl.hh
index abe751c..5c64377 100644
--- a/src/cpu/o3/lsq_impl.hh
+++ b/src/cpu/o3/lsq_impl.hh
@@ -685,7 +685,7 @@
     // This comming request can be either load, store or atomic.
     // Atomic request has a corresponding pointer to its atomic memory
     // operation
-    bool isAtomic = !isLoad && amo_op;
+    bool isAtomic M5_VAR_USED = !isLoad && amo_op;
 
     ThreadID tid = cpu->contextToThread(inst->contextId());
     auto cacheLineSize = cpu->cacheLineSize();