diff --git a/rtlib/calltree/utils.cpp b/rtlib/calltree/utils.cpp
index 863607fde..b4f2924a9 100644
--- a/rtlib/calltree/utils.cpp
+++ b/rtlib/calltree/utils.cpp
@@ -17,7 +17,7 @@
 
 namespace __dp {
 
-DependencyMetadata processQueueElement(MetaDataQueueElement mdqe) {
+DependencyMetadata processQueueElement(MetaDataQueueElement && mdqe) {
   const auto calltree_timer = Timer(timers, TimerRegion::PROCESSQUEUEELEMENT);
 
   // cout << "processing " << mdqe.toString() << "\n";
diff --git a/rtlib/calltree/utils.hpp b/rtlib/calltree/utils.hpp
index e823db615..809190cf2 100644
--- a/rtlib/calltree/utils.hpp
+++ b/rtlib/calltree/utils.hpp
@@ -14,5 +14,5 @@
 #include "MetaDataQueueElement.hpp"
 
 namespace __dp {
-DependencyMetadata processQueueElement(MetaDataQueueElement mdqe);
+DependencyMetadata processQueueElement(MetaDataQueueElement && mdqe);
 } // namespace __dp