diff --git a/contributors.txt b/contributors.txt
index 64699a54d..caf196135 100644
--- a/contributors.txt
+++ b/contributors.txt
@@ -166,4 +166,5 @@ YYYY/MM/DD, github id, Full name, email
 2017/09/11, sachinjain024, Sachin Jain, sachinjain024@gmail.com
 2017/10/06, bramp, Andrew Brampton, brampton@gmail.com
 2017/10/15, simkimsia, Sim Kim Sia, kimcity@gmail.com
-2017/05/29, rlfnb, Ralf Neeb, rlfnb@rlfnb.de
+2017/10/27, Griffon26, Maurice van der Pot, griffon26@kfk4ever.com
+2017/05/29, rlfnb, Ralf Neeb, rlfnb@rlfnb.de
\ No newline at end of file
diff --git a/runtime/Cpp/runtime/src/atn/LexerActionExecutor.cpp b/runtime/Cpp/runtime/src/atn/LexerActionExecutor.cpp
index c9c32f074..1ae510f75 100755
--- a/runtime/Cpp/runtime/src/atn/LexerActionExecutor.cpp
+++ b/runtime/Cpp/runtime/src/atn/LexerActionExecutor.cpp
@@ -101,7 +101,7 @@ size_t LexerActionExecutor::generateHashCode() const {
   for (auto lexerAction : _lexerActions) {
     hash = MurmurHash::update(hash, lexerAction);
   }
-  MurmurHash::finish(hash, _lexerActions.size());
+  hash = MurmurHash::finish(hash, _lexerActions.size());
 
   return hash;
 }
diff --git a/runtime/Cpp/runtime/src/misc/IntervalSet.cpp b/runtime/Cpp/runtime/src/misc/IntervalSet.cpp
index ab4d240cc..b76409405 100755
--- a/runtime/Cpp/runtime/src/misc/IntervalSet.cpp
+++ b/runtime/Cpp/runtime/src/misc/IntervalSet.cpp
@@ -44,6 +44,8 @@ IntervalSet::IntervalSet(int n, ...) : IntervalSet() {
   for (int i = 0; i < n; i++) {
     add(va_arg(vlist, int));
   }
+
+  va_end(vlist);
 }
 
 IntervalSet::~IntervalSet()