diff --git a/plugins/input/postgis/postgis_datasource.cpp b/plugins/input/postgis/postgis_datasource.cpp
index 2d0d642f9..7422ecaf5 100644
--- a/plugins/input/postgis/postgis_datasource.cpp
+++ b/plugins/input/postgis/postgis_datasource.cpp
@@ -380,7 +380,7 @@ std::string postgis_datasource::populate_tokens(const std::string& sql) const
     return populated_sql;
 }
 
-std::string postgis_datasource::populate_tokens(const std::string& sql, double const& scale_denom, box2d<double> const& env) const
+std::string postgis_datasource::populate_tokens(const std::string& sql, double scale_denom, box2d<double> const& env) const
 {
     std::string populated_sql = sql;
     std::string box = sql_bbox(env);
diff --git a/plugins/input/postgis/postgis_datasource.hpp b/plugins/input/postgis/postgis_datasource.hpp
index 0ad00df9c..eb5c1e129 100644
--- a/plugins/input/postgis/postgis_datasource.hpp
+++ b/plugins/input/postgis/postgis_datasource.hpp
@@ -89,7 +89,7 @@ public:
     void bind() const;
 private:
     std::string sql_bbox(box2d<double> const& env) const;
-    std::string populate_tokens(const std::string& sql, double const& scale_denom, box2d<double> const& env) const;
+    std::string populate_tokens(const std::string& sql, double scale_denom, box2d<double> const& env) const;
     std::string populate_tokens(const std::string& sql) const;
     static std::string unquote(const std::string& sql);
     boost::shared_ptr<IResultSet> get_resultset(boost::shared_ptr<Connection> const &conn, const std::string &sql) const;