diff --git a/trashernet/trashernet_phy.vhd b/trashernet/trashernet_phy.vhd
index 43c710d..61a3ff4 100644
--- a/trashernet/trashernet_phy.vhd
+++ b/trashernet/trashernet_phy.vhd
@@ -56,7 +56,7 @@ begin
 		signal bit_cnt : integer range 0 to 7;
 
 		-- NLP supervision
-		constant NLP_TIMEOUT_CNT_MAX : integer := integer(round(real(F_CLK) * 16.0 * 10.0 ** (-3))); -- Every 16 ms
+		constant NLP_TIMEOUT_CNT_MAX : integer := integer(round(real(F_CLK) * 16.0 * 10.0 ** (-3))) - 1; -- Every 16 ms
 		signal nlp_timeout_cnt       : integer range 0 to NLP_TIMEOUT_CNT_MAX;
 	begin
 		-- Synchronize RX input