diff --git a/rtl/sampler/src/sampler.sv b/rtl/sampler/src/sampler.sv
index a6bd290..2ca3fb7 100644
--- a/rtl/sampler/src/sampler.sv
+++ b/rtl/sampler/src/sampler.sv
@@ -83,7 +83,7 @@ module sampler
                 end
                 if (enable) begin
                     if (!out_of_range_reg) begin
-                        if (cnt_smp_num != smp_num_reg-1) begin
+                        if (cnt_smp_num != smp_num_reg) begin
                             buffer       <= data_converted;
                             buffer_ready <= 1;
                             cnt_smp_num <= cnt_smp_num +1;
@@ -122,7 +122,7 @@ module sampler
                 end
                 if (enable) begin
                     if (!out_of_range_reg) begin
-                        if (cnt_smp_num != smp_num_reg-1) begin
+                        if (cnt_smp_num != smp_num_reg) begin
                             cnt_smp_num <= cnt_smp_num +1;
                             buffer <= {buffer[DATA_WIDTH*(PACK_FACTOR-1)-1:0], data_converted};
                             if (cnt == PACK_FACTOR-1) begin