diff --git a/main.cpp b/main.cpp
index c820b0e..5cae2e4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -87,7 +87,10 @@ int main(int argc, char* argv[])
     cout << "functions: " << cfg.functions.size() << endl;
     cout << "indirect targets: " << cfg.indirect_targets.size() << endl;
 
-    string out = path + ".cfg";
+    string suffix;
+    if (subsOnly) suffix += ".subs";
+    if (clean) suffix += ".clean";
+    string out = path + suffix + ".cfg";
     ofstream f(out);
     if (f)
     {