1 files changed, 1 insertions, 1 deletions

diff --git a/hdl/top.sv b/hdl/top.sv
index 54cfdc5..a1cdbf7 100644
--- a/hdl/top.sv
+++ b/hdl/top.sv
@@ -133,7 +133,7 @@ always_ff @(posedge clk) begin
                             if (operand[1]) ++acc;
                             if (operand[2]) --acc;
                             if (operand[6]) state = MEMORY;
-                            if (operand[7]) state = HALT;
+                            if (operand == 0) state = HALT;
                         end
                         'h1: acc = sign_extended_operand;
                         'h2, 'h3: begin