diff --git a/rtl/generator/src/generator.sv b/rtl/generator/src/generator.sv
index 118fed6..e37d991 100644
--- a/rtl/generator/src/generator.sv
+++ b/rtl/generator/src/generator.sv
@@ -34,8 +34,8 @@ module generator
     
     always @(posedge clk_in) begin
         if (rst) begin
-            pulse_height_reg <= 0;
-            pulse_height_out_reg <= '0;
+            pulse_height_reg <= ZERO_LEVEL;
+            pulse_height_out_reg <= ZERO_LEVEL;
             pulse_width_reg <= '0;
             pulse_period_reg <= '0;
             pulse_num_reg <= '0;