diff --git a/app/src/main/java/lightcontainer/protocol/rules/writer/SignErrorRule.java b/app/src/main/java/lightcontainer/protocol/rules/writer/SignErrorRule.java
index ca02cc6..394ca0b 100644
--- a/app/src/main/java/lightcontainer/protocol/rules/writer/SignErrorRule.java
+++ b/app/src/main/java/lightcontainer/protocol/rules/writer/SignErrorRule.java
@@ -1,13 +1,16 @@
 package lightcontainer.protocol.rules.writer;
 
 import lightcontainer.protocol.ProtocolWriter;
+import lightcontainer.protocol.StandardizedDefinitions;
+
+import static lightcontainer.protocol.StandardizedDefinitions.FFE_SIGN_ERROR;
 
 /**
  * Règle renvoyée au client lorsque l'authentification a échoué.
  */
 public class SignErrorRule extends ProtocolWriter {
     //"^SIGN_ERROR\r\n$"
-    private static final String PATTERN = "^SIGN_ERROR\r\n$";
+    private static final String PATTERN = FFE_SIGN_ERROR;
 
     public static final String NAME = "SIGN_ERROR";