diff --git a/src/properties.cpp b/src/properties.cpp
index 0f41995e7..a2e454d94 100644
--- a/src/properties.cpp
+++ b/src/properties.cpp
@@ -90,14 +90,14 @@ void properties_t::set_string(std::string const &property,
     m_to_update[property] = value;
 }
 
-void properties_t::set_int(std::string property, int64_t value)
+void properties_t::set_int(std::string const &property, int64_t value)
 {
-    set_string(std::move(property), std::to_string(value));
+    set_string(property, std::to_string(value));
 }
 
-void properties_t::set_bool(std::string property, bool value)
+void properties_t::set_bool(std::string const &property, bool value)
 {
-    set_string(std::move(property), value ? "true" : "false");
+    set_string(property, value ? "true" : "false");
 }
 
 void properties_t::init_table()
diff --git a/src/properties.hpp b/src/properties.hpp
index ac27e9a3a..0aa51399b 100644
--- a/src/properties.hpp
+++ b/src/properties.hpp
@@ -63,7 +63,7 @@ class properties_t
      * \param property Name of the property
      * \param value Value of the property
      */
-    void set_int(std::string property, int64_t value);
+    void set_int(std::string const &property, int64_t value);
 
     /**
      * Set property to boolean value. In the database this will show up as the
@@ -72,7 +72,7 @@ class properties_t
      * \param property Name of the property
      * \param value Value of the property
      */
-    void set_bool(std::string property, bool value);
+    void set_bool(std::string const &property, bool value);
 
     /**
      * Initialize the database table 'osm2pgsql_properties'. It is created if