diff --git a/interpreter.cpp b/interpreter.cpp
index bd3db0e..aa91e31 100644
--- a/interpreter.cpp
+++ b/interpreter.cpp
@@ -33,7 +33,7 @@ std::string interpreter::eval(std::istream& in, bool& done) {
     reset();
     done = false;
 
-    // first pass: read program & resolve labels
+    // first pass: read program & resolve labels, ignore comments
     for (std::string line; std::getline(in, line);) {
         if (line[0] == ':') { // check label definition
             _labels.emplace(line.substr(1), _prog.size());
@@ -46,7 +46,6 @@ std::string interpreter::eval(std::istream& in, bool& done) {
     }
 
     // second pass: run program
-    _pc = 0;
     while (_pc < _prog.size() && !done) {
         // fetch next instruction
         std::string code {_prog[_pc]};