diff --git a/src/main.cpp b/src/main.cpp
index af0e85c..78e0f10 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -40,10 +40,9 @@ int main(int argc, char* argv[]) {
         return transpiledString;
     };
     if (!files.empty()) {
-        vector<future<pair<string, optional<Yerbacon::Exception>>>> Units;
+        vector<future<pair<string, optional<Yerbacon::Exception>>>> Units(files.size());
         const launch& Policy = not parallel ? launch::deferred : launch::async;
-        Units.reserve(files.size());
-        transform(files.begin(), files.end(), back_inserter(Units), [&Policy, &compile](const string_view& fileName){
+        transform(files.begin(), files.end(), Units.begin(), [&Policy, &compile](const string_view& fileName){
             return async(Policy, [&fileName, &compile]() {
                 pair<string, optional<Yerbacon::Exception>> resultingPair;
                 try {