--- a/src/boomerang/core/Project.cpp
+++ b/src/boomerang/core/Project.cpp
@@ -303,7 +303,7 @@
 void Project::loadSymbols()
 {
     // Add symbols from -s switch(es)
-    for (const std::pair<Address, QString> &elem : getSettings()->m_symbolMap) {
+    for (const std::pair<const Address, QString> &elem : getSettings()->m_symbolMap) {
         m_loadedBinary->getSymbols()->createSymbol(elem.first, elem.second);
     }