diff --git a/core/DHT.c b/core/DHT.c
index 6375b86b..f6c48a6d 100644
--- a/core/DHT.c
+++ b/core/DHT.c
@@ -1108,7 +1108,7 @@ static int send_NATping(uint8_t * public_key, uint64_t ping_id, uint8_t type)
 static int handle_NATping(uint8_t * packet, uint32_t length, IP_Port source)
 {
     if (length < crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + ENCRYPTION_PADDING 
-            && length > MAX_DATA_SIZE + ENCRYPTION_PADDING)
+            || length > MAX_DATA_SIZE + ENCRYPTION_PADDING)
         return 1;
 
     /* check if request is for us. */