diff --git a/tools/dnc/main.cpp b/tools/dnc/main.cpp
index f759ff5..9ff8c2c 100644
--- a/tools/dnc/main.cpp
+++ b/tools/dnc/main.cpp
@@ -149,7 +149,7 @@
         Log("Read configuration file: {}\n", params.configuration.c_str());
         std::ifstream config_file(params.configuration);
         if (!config_file.is_open()) {
-            std::cerr << "Error: Could not open configuration file.\n";
+            std::cerr << "Error: Unable to open configuration file.\n";
         } else {
             YAML::Node config = YAML::Load(config_file);
             if (config["bootstrap"] && params.bootstrap.empty()) {