diff --git a/src/tiny_shader_top.sv b/src/tiny_shader_top.sv
index 75488b0..08f1106 100644
--- a/src/tiny_shader_top.sv
+++ b/src/tiny_shader_top.sv
@@ -205,8 +205,8 @@ module tiny_shader_top (
     
     always_ff @(posedge clk_i, negedge rst_ni) begin
         if (!rst_ni) begin
-            x_subpos = '0;
-            y_subpos = '0;
+            x_subpos <= '0;
+            y_subpos <= '0;
         end else begin
             if (execute_shader_x || x_subpos > 0) begin
                 // X sub position