diff --git a/lib/radio/nco/src/nco_cordic.vhd b/lib/radio/nco/src/nco_cordic.vhd
index d5fa5fc..8536f58 100644
--- a/lib/radio/nco/src/nco_cordic.vhd
+++ b/lib/radio/nco/src/nco_cordic.vhd
@@ -34,6 +34,7 @@ entity nco is
 Generic
 (
 	nbits_wave		: integer := 18;
+	nbits_wave_frac	: integer := 16;
 	nbits_phase		: integer := 16
 );
 Port
@@ -91,7 +92,6 @@ architecture Behavioral of nco is
 	END COMPONENT;
 
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-	constant nbits_wave_frac : integer := nbits_wave-1;
 	constant nbits_phase_frac : integer := nbits_phase;
 
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