diff --git a/src/tiny_shader_top.sv b/src/tiny_shader_top.sv
index ac19fd9..600f9b8 100644
--- a/src/tiny_shader_top.sv
+++ b/src/tiny_shader_top.sv
@@ -26,7 +26,7 @@ module tiny_shader_top (
     output logic       next_frame_o,
     
     // Debug signals
-    output logic [1:0] debug_i,
+    input  logic [1:0] debug_i,
     output logic [1:0] debug_o
 );