diff --git a/hcore/include/opts.h b/hcore/include/opts.h
index e3c5608..cbd1967 100644
--- a/hcore/include/opts.h
+++ b/hcore/include/opts.h
@@ -20,7 +20,7 @@ public:
     std::vector<std::string> extro;
     std::vector<std::string> intero;
     std::vector<std::string> actuator;
-    std::string devFile;
+    std::vector<std::string> deviceSpecFiles;
     bool verbose, printUsage;
 
     static struct option longOptions[];
diff --git a/hcore/opts.cpp b/hcore/opts.cpp
index 4c6d780..91666d9 100644
--- a/hcore/opts.cpp
+++ b/hcore/opts.cpp
@@ -39,7 +39,7 @@ void OptionParser::parseArguments(int argc, char *argv[])
             actuator.push_back(optarg);
             break;
         case 'd':
-            devFile = optarg;
+            deviceSpecFiles.push_back(optarg);
             break;
         case 'v':
             verbose = true;
@@ -87,5 +87,9 @@ void OptionParser::dumpOptions() const
     }
     std::cout << std::endl;
 
-    std::cout << "Dev file: " << devFile << std::endl;
+    std::cout << "Device Spec Files: ";
+    for (const auto& file : deviceSpecFiles) {
+        std::cout << file << " ";
+    }
+    std::cout << std::endl;
 }