diff --git a/RNS/Link.py b/RNS/Link.py
index f2b62b9..9b85648 100644
--- a/RNS/Link.py
+++ b/RNS/Link.py
@@ -302,7 +302,7 @@ class Link:
 
     def prove(self):
         mtu_bytes = b""
-        if RNS.Reticulum.LINK_MTU_DISCOVERY and self.mtu != RNS.Reticulum.MTU:
+        if self.mtu != RNS.Reticulum.MTU:
             mtu_bytes = Link.mtu_bytes(self.mtu)
 
         signed_data = self.link_id+self.pub_bytes+self.sig_pub_bytes+mtu_bytes