diff --git a/src/transpiler/MainTranspile.cpp b/src/transpiler/MainTranspile.cpp
index f9840c4..1121036 100644
--- a/src/transpiler/MainTranspile.cpp
+++ b/src/transpiler/MainTranspile.cpp
@@ -8,7 +8,7 @@ pair<LANGUAGE, bool> validLanguage(const string& it) {
     static const string_view languages[3] = {".lua", ".js", ".py"};
     LANGUAGE selected = LUA;
     bool valid = false;
-    for (unsigned short i = 0; (i < languages->size()); ++i) {
+    for (unsigned short i = 0; (i <= (languages->size() - 2)); ++i) {
         if (it == languages[i]) {
             selected = static_cast<LANGUAGE>(i);
             valid = true;