diff --git a/src/output.cpp b/src/output.cpp
index 401ad8338d..58f081f676 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -576,9 +576,12 @@ void write_tallies()
   if (model::tallies.empty())
     return;
 
+  // Set filename for tallies_out
+  std::string filename = fmt::format("{}tallies.out", settings::path_output);
+
   // Open the tallies.out file.
   std::ofstream tallies_out;
-  tallies_out.open("tallies.out", std::ios::out | std::ios::trunc);
+  tallies_out.open(filename, std::ios::out | std::ios::trunc);
 
   // Loop over each tally.
   for (auto i_tally = 0; i_tally < model::tallies.size(); ++i_tally) {
diff --git a/src/summary.cpp b/src/summary.cpp
index fc81ac7bb8..b3ea0254e6 100644
--- a/src/summary.cpp
+++ b/src/summary.cpp
@@ -22,8 +22,11 @@ void write_summary()
   // Display output message
   write_message("Writing summary.h5 file...", 5);
 
+  // Set filename for summary file
+  std::string filename = fmt::format("{}summary.h5", settings::path_output);
+
   // Create a new file using default properties.
-  hid_t file = file_open("summary.h5", 'w');
+  hid_t file = file_open(filename, 'w');
 
   write_header(file);
   write_nuclides(file);