diff --git a/rtl/z_dsp/diff_p.v b/rtl/z_dsp/diff_p.v
index 6bf89b7..fc9e011 100644
--- a/rtl/z_dsp/diff_p.v
+++ b/rtl/z_dsp/diff_p.v
@@ -124,6 +124,7 @@ if(rstn==1'b0)begin
     diff_p6_r1 <= 0;
     diff_p7_r1 <= 0;
 end
+end
 
 wire [15:0] din_wire [0:3];