added circle placement for ns3 wifi nodes

[simgrid.git] / include / xbt / random.hpp

diff --git a/include/xbt/random.hpp b/include/xbt/random.hpp
index d4c612f653ada195b4f0d36a1b947de6acce0da0..7d4e4ef30b14a746a12c0fb4157b9e2c4b831458 100644 (file)
--- a/include/xbt/random.hpp
+++ b/include/xbt/random.hpp
@@ -45,7 +45,7 @@ public:
   /**
    * @brief Write the state of the Mersenne-Twister RNG to a file
    */
-  bool write_state(const std::string& filename);
+  bool write_state(const std::string& filename) const;
 
   /**
    * @brief Draws an integer number uniformly in range [min, max] (min and max included)