diff --git a/library/common/util_pulse_gen.v b/library/common/util_pulse_gen.v
index 5e55ea0cf..d89986b83 100644
--- a/library/common/util_pulse_gen.v
+++ b/library/common/util_pulse_gen.v
@@ -68,11 +68,11 @@ module util_pulse_gen #(
     if (rstn == 1'b0) begin
       pulse_period_cnt <= 32'h0;
     end else begin
-      pulse_period_cnt <= (pulse_period_cnt < pulse_period_d) ? (pulse_period_cnt + 1) : 32'b0;
+      pulse_period_cnt <= (pulse_period_cnt == pulse_period_d) ? 32'b0 : (pulse_period_cnt + 1);
     end
   end
 
-  assign  end_of_period_s = (pulse_period_cnt == (pulse_period_d - 1)) ? 1'b1 : 1'b0;
+  assign  end_of_period_s = (pulse_period_cnt == pulse_period_d) ? 1'b1 : 1'b0;
 
   // generate pulse with a specified width