diff --git a/rtl/z_dsp/TailCorr_top.v b/rtl/z_dsp/TailCorr_top.v
index b469746..9dea63a 100644
--- a/rtl/z_dsp/TailCorr_top.v
+++ b/rtl/z_dsp/TailCorr_top.v
@@ -30,18 +30,18 @@
 //  Synthesizable (y/n): 
 //  Other:
 //-FHDR--------------------------------------------------------------------------------------------------------
-
-parameter  data_in_width       = 16; 
-parameter  max_coef_width      = 32; 
-parameter  frac_data_out_width = 20;//X for in,5
-parameter  frac_coef_width     = 31;//division
-parameter  feedback_width      = 36; 
-parameter  data_out_width      = 36;  
-parameter  saturation_mode     =  0;
-parameter  out_reg             =  1;
-
 module 	TailCorr_top	 	
+#(
+ parameter  data_in_width       = 16 
+,parameter  max_coef_width      = 32 
+,parameter  frac_data_out_width = 20//X for in,5
+,parameter  frac_coef_width     = 31//division
+,parameter  feedback_width      = 36 
+,parameter  data_out_width      = 36  
+,parameter  saturation_mode     =  0
+,parameter  out_reg             =  1
 
+)
 (
 input			clk,
 input			rstn,