diff --git a/src/main/java/org/sablecc/sablecc/ConflictException.java b/src/main/java/org/sablecc/sablecc/ConflictException.java
index 9dc3a376edde0b46520b4f2d0a2eee779e4734cf..ab0e29263294c55a3888eb112a1e93a1efdb29ba 100644
--- a/src/main/java/org/sablecc/sablecc/ConflictException.java
+++ b/src/main/java/org/sablecc/sablecc/ConflictException.java
@@ -10,6 +10,7 @@ package org.sablecc.sablecc;
 import org.sablecc.sablecc.node.*;
 import java.util.Set;
 
+@SuppressWarnings("serial")
 public class ConflictException extends Exception
 {
   private Set conflictualProductions;