diff --git a/library/common/up_dac_common.v b/library/common/up_dac_common.v
index f5b676dfc..0517b4ac4 100644
--- a/library/common/up_dac_common.v
+++ b/library/common/up_dac_common.v
@@ -226,9 +226,9 @@ module up_dac_common #(
         up_dac_sync <= up_wdata[0];
       end
       if ((up_wreq_s == 1'b1) && (up_waddr[6:0] == 7'h12)) begin
-	  up_dac_sdr_ddr_n <= up_wdata[16];
-	  up_dac_symb_op <= up_wdata[15];
-	  up_dac_symb_8_16b <= up_wdata[14];
+        up_dac_sdr_ddr_n <= up_wdata[16];
+        up_dac_symb_op <= up_wdata[15];
+        up_dac_symb_8_16b <= up_wdata[14];
         up_dac_num_lanes <= up_wdata[12:8];
         up_dac_par_type <= up_wdata[7];
         up_dac_par_enb <= up_wdata[6];
@@ -405,8 +405,8 @@ module up_dac_common #(
           7'h10: up_rdata_int <= {29'd0, up_dac_clk_enb, up_mmcm_resetn, up_resetn};
           7'h11: up_rdata_int <= {31'd0, up_dac_sync};
           7'h12: up_rdata_int <= {15'd0, up_dac_sdr_ddr_n,
-		                    up_dac_symb_op, up_dac_symb_8_16b,
-		                    1'd0, up_dac_num_lanes,
+                                  up_dac_symb_op, up_dac_symb_8_16b,
+                                  1'd0, up_dac_num_lanes,
                                   up_dac_par_type, up_dac_par_enb, up_dac_r1_mode, up_dac_datafmt,
                                   4'd0};
           7'h13: up_rdata_int <= {16'd0, up_dac_datarate};
@@ -446,8 +446,8 @@ module up_dac_common #(
     .up_rstn (up_rstn),
     .up_clk (up_clk),
     .up_data_cntrl ({ up_dac_sdr_ddr_n,
-    		        up_dac_symb_op,
-		        up_dac_symb_8_16b,
+                      up_dac_symb_op,
+                      up_dac_symb_8_16b,
                       up_dac_num_lanes,
                       up_dac_sync,
                       up_dac_clksel,
@@ -463,7 +463,7 @@ module up_dac_common #(
     .d_clk (dac_clk),
     .d_data_cntrl ({  dac_sdr_ddr_n,
                       dac_symb_op,
-		        dac_symb_8_16b,
+                      dac_symb_8_16b,
                       dac_num_lanes,
                       dac_sync_s,
                       dac_clksel,