diff --git a/src/main/resources/org/sablecc/sablecc/lexer.txt b/src/main/resources/org/sablecc/sablecc/lexer.txt
index e0908c0285386fe1b12e8f3cef6540b705ba7d18..92312f5275a60d69ea93939d9e89c5c9f1cbbf86 100644
--- a/src/main/resources/org/sablecc/sablecc/lexer.txt
+++ b/src/main/resources/org/sablecc/sablecc/lexer.txt
@@ -30,6 +30,7 @@ import java.io.*;
 import java.util.*;
 import $1$.*;
 import de.hhu.stups.sablecc.patch.*;
+import java.util.concurrent.LinkedBlockingQueue;
 
 
 @SuppressWarnings({"unused"})