diff --git a/src/mesh/ReliableRouter.cpp b/src/mesh/ReliableRouter.cpp
index 0c9180eb5..4c8c1e1e7 100644
--- a/src/mesh/ReliableRouter.cpp
+++ b/src/mesh/ReliableRouter.cpp
@@ -111,7 +111,7 @@ void ReliableRouter::sniffReceived(const meshtastic_MeshPacket *p, const meshtas
             } else if (p->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
                 sendAckNak(meshtastic_Routing_Error_NONE, getFrom(p), p->id, p->channel, p->hop_start, p->hop_limit);
             } else if (p->which_payload_variant == meshtastic_MeshPacket_encrypted_tag && p->channel == 0 &&
-                       (nodeDB->getMeshNode(p->from) != nullptr || nodeDB->getMeshNode(p->from)->user.public_key.size == 0)) {
+                       (nodeDB->getMeshNode(p->from) == nullptr || nodeDB->getMeshNode(p->from)->user.public_key.size == 0)) {
                 // This looks like it might be a PKI packet from an unknown node, so send PKI_UNKNOWN_PUBKEY
                 sendAckNak(meshtastic_Routing_Error_PKI_UNKNOWN_PUBKEY, getFrom(p), p->id, channels.getPrimaryIndex(),
                            p->hop_start, p->hop_limit);