diff --git a/spice/WritePathSpice.cc b/spice/WritePathSpice.cc
index 842b2620..1b90af87 100644
--- a/spice/WritePathSpice.cc
+++ b/spice/WritePathSpice.cc
@@ -193,7 +193,7 @@ WritePathSpice::WritePathSpice(const Path *path,
 void
 WritePathSpice::writeSpice()
 {
-  spice_stream_.open(std::string(spice_filename_));
+  spice_stream_.open(spice_filename_);
   if (spice_stream_.is_open()) {
     path_expanded_.expand(path_, true);
     // Find subckt port names as a side-effect of writeSubckts.
diff --git a/spice/WriteSpice.hh b/spice/WriteSpice.hh
index 5230b72b..a1fd64a3 100644
--- a/spice/WriteSpice.hh
+++ b/spice/WriteSpice.hh
@@ -165,12 +165,12 @@ protected:
   std::string replaceFileExt(std::string_view filename,
                              std::string_view ext);
 
-  const std::string_view spice_filename_;
-  const std::string_view subckt_filename_;
-  const std::string_view lib_subckt_filename_;
-  const std::string_view model_filename_;
-  const std::string_view power_name_;
-  const std::string_view gnd_name_;
+  const std::string spice_filename_;
+  const std::string subckt_filename_;
+  const std::string lib_subckt_filename_;
+  const std::string model_filename_;
+  const std::string power_name_;
+  const std::string gnd_name_;
   CircuitSim ckt_sim_;
   const Scene *scene_;
   const MinMax *min_max_;