diff --git a/tools/lexer/jflex-1.4/lib/JFlex.jar b/tools/lexer/jflex-1.4/lib/JFlex.jar
index 762e5de50969..f50c5af0be13 100644
Binary files a/tools/lexer/jflex-1.4/lib/JFlex.jar and b/tools/lexer/jflex-1.4/lib/JFlex.jar differ
diff --git a/tools/lexer/jflex-1.4/src/JFlex/Emitter.java b/tools/lexer/jflex-1.4/src/JFlex/Emitter.java
index 0ec739d2f4fb..90128690bb0b 100644
--- a/tools/lexer/jflex-1.4/src/JFlex/Emitter.java
+++ b/tools/lexer/jflex-1.4/src/JFlex/Emitter.java
@@ -369,7 +369,7 @@ final public class Emitter {
 
   private String zzBufferLLength() {
     if (Options.sliceAndCharAt) {
-      return "zzBufferArrayL != null ? zzBufferArrayL.length:zzBufferL.length()";
+      return "(zzBufferArrayL != null ? zzBufferArrayL.length : zzBufferL.length())";
     }
     if (Options.char_at) {
       return "zzBufferL.length()";