diff --git a/wasi01/src/main.zig b/wasi01/src/main.zig
index 28a4754..d944122 100644
--- a/wasi01/src/main.zig
+++ b/wasi01/src/main.zig
@@ -6,7 +6,7 @@ pub fn main() !void {
     const args = try std.process.argsAlloc(gpa);
     defer std.process.argsFree(gpa, args);
 
-    for (args) |arg, i| {
+    for (args, 0..) |arg, i| {
         std.debug.print("{}: {s}\n", .{ i, arg });
     }
 }