diff --git a/lib/misc/async_types.vhd b/lib/misc/async_types.vhd
index f39a02a..61c335f 100644
--- a/lib/misc/async_types.vhd
+++ b/lib/misc/async_types.vhd
@@ -53,7 +53,7 @@ package body async_types is
 	function to_cycles(T_ns : real; f_hz : natural) return natural is
 	begin
 		
-		return natural(0.5 + 10.0E-9*T_ns*real(f_hz));
+		return natural(0.5 + 1.0E-9*T_ns*real(f_hz));
 
 	end to_cycles;	
 end async_types;