diff --git a/main.cpp b/main.cpp
index 5b9a18a..f779d06 100644
--- a/main.cpp
+++ b/main.cpp
@@ -140,7 +140,7 @@ int main(int argc, char** argv) {
         machine_str = MachineFactory::machine_name_from_rom(bootrom_path);
         if (machine_str.empty()) {
             LOG_F(ERROR, "Could not autodetect machine");
-            return 0;
+            return 1;
         }
         else {
             LOG_F(INFO, "Machine was autodetected as: %s", machine_str.c_str());
@@ -150,7 +150,7 @@ int main(int argc, char** argv) {
     /* handle overriding of machine settings from command line */
     map<string, string> settings;
     if (MachineFactory::get_machine_settings(machine_str, settings) < 0) {
-        return 0;
+        return 1;
     }
 
     CLI::App sa;
@@ -168,7 +168,7 @@ int main(int argc, char** argv) {
 
     if (SDL_Init(SDL_INIT_VIDEO)) {
         LOG_F(ERROR, "SDL_Init error: %s", SDL_GetError());
-        return 0;
+        return 1;
     }
 
     // initialize global profiler object
@@ -206,7 +206,7 @@ int main(int argc, char** argv) {
         break;
     default:
         LOG_F(ERROR, "Invalid EXECUTION MODE");
-        return 0;
+        return 1;
     }
 
 bail: