diff --git a/ASTNode.cpp b/ASTNode.cpp
index b93a405..6959d6a 100644
--- a/ASTNode.cpp
+++ b/ASTNode.cpp
@@ -11,7 +11,7 @@ void ASTNodeList::removeLast()
 
 void ASTNodeList::removeFirst()
 {
-    m_nodes.erase(m_nodes.begin());
+    m_nodes.erase(m_nodes.cbegin());
 }
 
 
diff --git a/ASTree.cpp b/ASTree.cpp
index c58b7be..0f8ca3b 100644
--- a/ASTree.cpp
+++ b/ASTree.cpp
@@ -34,7 +34,7 @@ static bool printClassDocstring = true;
 // shortcut for all top/pop calls
 static PycRef<ASTNode> StackPopTop(FastStack& stack)
 {
-    const auto node(stack.top());
+    const auto node{ stack.top() };
     stack.pop();
     return node;
 }