diff --git a/rtl/lss/taxi_uart.sv b/rtl/lss/taxi_uart.sv
index 327735a..32541d0 100644
--- a/rtl/lss/taxi_uart.sv
+++ b/rtl/lss/taxi_uart.sv
@@ -15,10 +15,7 @@ Authors:
 /*
  * AXI4-Stream UART
  */
-module taxi_uart #
-(
-    parameter DATA_W = 8
-)
+module taxi_uart
 (
     input  wire logic         clk,
     input  wire logic         rst,
@@ -54,9 +51,7 @@ module taxi_uart #
 
 );
 
-taxi_uart_tx #(
-    .DATA_W(DATA_W)
-)
+taxi_uart_tx
 uart_tx_inst (
     .clk(clk),
     .rst(rst),
@@ -82,9 +77,7 @@ uart_tx_inst (
     .prescale(prescale)
 );
 
-taxi_uart_rx #(
-    .DATA_W(DATA_W)
-)
+taxi_uart_rx
 uart_rx_inst (
     .clk(clk),
     .rst(rst),
diff --git a/rtl/lss/taxi_uart_rx.sv b/rtl/lss/taxi_uart_rx.sv
index 7382608..50af224 100644
--- a/rtl/lss/taxi_uart_rx.sv
+++ b/rtl/lss/taxi_uart_rx.sv
@@ -15,10 +15,7 @@ Authors:
 /*
  * AXI4-Stream UART (RX)
  */
-module taxi_uart_rx #
-(
-    parameter DATA_W = 8
-)
+module taxi_uart_rx
 (
     input  wire logic         clk,
     input  wire logic         rst,
@@ -47,9 +44,7 @@ module taxi_uart_rx #
 
 );
 
-// check configuration
-if (m_axis_rx.DATA_W != DATA_W)
-    $fatal(0, "Error: Interface parameter DATA_W mismatch (instance %m)");
+localparam DATA_W = m_axis_rx.DATA_W;
 
 logic [DATA_W-1:0] m_axis_tdata_reg = 0;
 logic m_axis_tvalid_reg = 0;
diff --git a/rtl/lss/taxi_uart_tx.sv b/rtl/lss/taxi_uart_tx.sv
index a695986..7361b67 100644
--- a/rtl/lss/taxi_uart_tx.sv
+++ b/rtl/lss/taxi_uart_tx.sv
@@ -15,10 +15,7 @@ Authors:
 /*
  * AXI4-Stream UART (TX)
  */
-module taxi_uart_tx #
-(
-    parameter DATA_W = 8
-)
+module taxi_uart_tx
 (
     input  wire logic         clk,
     input  wire logic         rst,
@@ -44,9 +41,7 @@ module taxi_uart_tx #
     input  wire logic [15:0]  prescale
 );
 
-// check configuration
-if (s_axis_tx.DATA_W != DATA_W)
-    $fatal(0, "Error: Interface parameter DATA_W mismatch (instance %m)");
+localparam DATA_W = s_axis_tx.DATA_W;
 
 logic s_axis_tready_reg = 0;
 
diff --git a/tb/lss/taxi_uart/test_taxi_uart.sv b/tb/lss/taxi_uart/test_taxi_uart.sv
index a36f596..b421131 100644
--- a/tb/lss/taxi_uart/test_taxi_uart.sv
+++ b/tb/lss/taxi_uart/test_taxi_uart.sv
@@ -39,9 +39,7 @@ logic rx_frame_error;
 
 logic [15:0] prescale;
 
-taxi_uart #(
-    .DATA_W(DATA_W)
-)
+taxi_uart
 uut (
     .clk(clk),
     .rst(rst),