diff --git a/lab2CA.srcs/sources_1/new/ALU.v b/lab2CA.srcs/sources_1/new/ALU.v
index bac2489..d5fa0c8 100644
--- a/lab2CA.srcs/sources_1/new/ALU.v
+++ b/lab2CA.srcs/sources_1/new/ALU.v
@@ -74,7 +74,7 @@ endmodule
 module alu_tb();
     reg [8:0] a;
     reg [8:0] b;
-    reg [2:0] c;
+    reg [3:0] c;
     wire [8:0] d;
 
     ALU alu0(
@@ -86,29 +86,29 @@ module alu_tb();
     initial begin
         a = 9'b000000111;
         b = 9'b000111000;
-        c = 3'b000;
+        c = 4'b0000;
         #5
         a = 9'b000011000;
         b = 9'b000011000;
-        c = 3'b001;
+        c = 4'b0001;
         #5
         a = 9'b101010100;
         b = 9'b010101011;
-        c = 3'b010;
+        c = 4'b0010;
         #5
         a = 9'b101010100;
         b = 9'b010101000;
-        c = 3'b011;
+        c = 4'b0011;
         #5
         a = 9'b000110000;
         b = 9'b000111000;
-        c = 3'b100;
+        c = 4'b0100;
         #5
         a = 9'b01011000;
-        c = 3'b101;
+        c = 4'b0101;
         #5
         a = 9'b00001010;
-        c = 3'b110;
+        c = 4'b0110;
         #5
         $finish;