diff --git a/include/ibm/locks.hpp b/include/ibm/locks.hpp
index 10f0a9a..b39bada 100644
--- a/include/ibm/locks.hpp
+++ b/include/ibm/locks.hpp
@@ -245,7 +245,7 @@
 
     // validate the lock request
 
-    for (auto& lockRecord : lockRequestStructure)
+    for (const auto& lockRecord : lockRequestStructure)
     {
         bool status = isValidLockRequest(lockRecord);
         if (!status)