diff --git a/src/Lexer.cpp b/src/Lexer.cpp
index 6d42fdac..a33b48f8 100644
--- a/src/Lexer.cpp
+++ b/src/Lexer.cpp
@@ -34,7 +34,6 @@
 ////////////////////////////////////////////////////////////////////////////////
 Lexer::Lexer (const std::string& text)
 : _text (text)
-, _cursor (0)
 , _eos (text.size ())
 {
 }
diff --git a/src/Lexer.h b/src/Lexer.h
index a14d79d2..2dcbff2b 100644
--- a/src/Lexer.h
+++ b/src/Lexer.h
@@ -43,7 +43,7 @@ public:
                     op,
                     word };
 
-  Lexer (const std::string&);
+  explicit Lexer (const std::string&);
   bool token (std::string&, Lexer::Type&);
   static std::string typeToString (Lexer::Type);
 
@@ -78,9 +78,9 @@ public:
   bool isWord         (std::string&, Lexer::Type&);
 
 private:
-  std::string _text;
-  std::size_t _cursor;
-  std::size_t _eos;
+  std::string _text   {};
+  std::size_t _cursor {0};
+  std::size_t _eos    {0};
 };
 
 #endif