diff --git a/runtime/Java/src/org/antlr/v4/runtime/Lexer.java b/runtime/Java/src/org/antlr/v4/runtime/Lexer.java
index ede5c3b73..4d07cc1de 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/Lexer.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/Lexer.java
@@ -99,6 +99,8 @@ public abstract class Lexer extends Recognizer<Integer, LexerATNSimulator>
 	 */
 	public String _text;
 
+	public Lexer() { }
+
 	public Lexer(CharStream input) {
 		this._input = input;
 	}