diff --git a/src/fr/devinsy/logar/app/anonymizer/Anonymizer.java b/src/fr/devinsy/logar/app/anonymizer/Anonymizer.java
index 188fb15..69125e7 100644
--- a/src/fr/devinsy/logar/app/anonymizer/Anonymizer.java
+++ b/src/fr/devinsy/logar/app/anonymizer/Anonymizer.java
@@ -178,7 +178,7 @@ public final class Anonymizer
         if (!StringUtils.equals(log.getUser(), "-"))
         {
             String anonUser = this.map.anonymizeUser(log.getUser());
-            line.replaceFirst(" " + log.getUser(), anonUser);
+            line = line.replaceFirst(" " + log.getUser(), " " + anonUser);
         }
 
         //