diff --git a/htdocs/blockedlog/class/blockedlog.class.php b/htdocs/blockedlog/class/blockedlog.class.php
index 091aeb87d41..c33391093a1 100644
--- a/htdocs/blockedlog/class/blockedlog.class.php
+++ b/htdocs/blockedlog/class/blockedlog.class.php
@@ -1766,7 +1766,7 @@ class BlockedLog
 			}
 		}
 
-		return $obfuscationkey;
+		return (string) $obfuscationkey;
 	}
 
 	/**