diff --git a/src/topology-read/model/rocketfuel-topology-reader.cc b/src/topology-read/model/rocketfuel-topology-reader.cc
index 47ac04e35..915a54b8f 100644
--- a/src/topology-read/model/rocketfuel-topology-reader.cc
+++ b/src/topology-read/model/rocketfuel-topology-reader.cc
@@ -88,13 +88,13 @@ RocketfuelTopologyReader::~RocketfuelTopologyReader()
  * Build a Regex object for RocketFuel topology maps file type
  * \return a static regex object for maps file type
  */
-static const std::regex rocketfuel_maps_regex(ROCKETFUEL_MAPS_LINE, std::regex::extended);
+static const std::regex rocketfuel_maps_regex(ROCKETFUEL_MAPS_LINE);
 
 /**
  * Build a Regex object for RocketFuel topology weights file type
  * \return a static regex object for weights file type
  */
-static const std::regex rocketfuel_weights_regex(ROCKETFUEL_WEIGHTS_LINE, std::regex::extended);
+static const std::regex rocketfuel_weights_regex(ROCKETFUEL_WEIGHTS_LINE);
 
 /**
  * \brief Print node info