diff --git a/l4d1_signature_linux.h b/l4d1_signature_linux.h
index dc14d5d..044c39f 100644
--- a/l4d1_signature_linux.h
+++ b/l4d1_signature_linux.h
@@ -43,7 +43,7 @@ void* players_org = NULL;
 
 //CBaseServer::SetReservationCookie(unsigned long long, char  const*, ...)
 //function in engine.so
-const char* unreserved = "\x11\x55\x57\x56\x53\x81\xEC\x3C\x01\x00\x00\xE8\xC3\xC3\xC3\xC3\x81\xC3\x33\x8E\x23\x00";
+const char* unreserved = "\x15\x55\x57\x56\x53\x81\xEC\x3C\x01\x00\x00\xE8\xC3\xC3\xC3\xC3\x81\xC3\x33\x8E\x23\x00";
 const char* unreserved_new = "\x01\x00\xC3";
 void* unreserved_org = NULL;