diff --git a/ReflexToQ3/includes/EntityConverter.cpp b/ReflexToQ3/includes/EntityConverter.cpp
index d2acdd5..8dac498 100644
--- a/ReflexToQ3/includes/EntityConverter.cpp
+++ b/ReflexToQ3/includes/EntityConverter.cpp
@@ -94,7 +94,7 @@ EntityConverter::EntityConverter(const std::string &entityMapFile,
  *--------------------------------------------------------------------------------------
  */
 void
-EntityConverter::extractMapInfo(std::queue<std::vector<std::string>> &entities)
+EntityConverter::extractMapInfo(std::queue<std::vector<std::string>> entities)
 {
   if( haveMapInfo_ ) {
     std::cerr << "Map info already extracted, doing nothing" << std::endl;
diff --git a/ReflexToQ3/includes/EntityConverter.hpp b/ReflexToQ3/includes/EntityConverter.hpp
index 4e251c3..456a00f 100644
--- a/ReflexToQ3/includes/EntityConverter.hpp
+++ b/ReflexToQ3/includes/EntityConverter.hpp
@@ -97,7 +97,7 @@ class EntityConverter
      *      THROWS:  runtime_error when encountering malformed entity
      *--------------------------------------------------------------------------------------
      */
-    void extractMapInfo(std::queue<std::vector<std::string>> &entities);
+    void extractMapInfo(std::queue<std::vector<std::string>> entities);