1 files changed, 1 insertions, 1 deletions
diff --git a/lib/std/os.zig b/lib/std/os.zig
index 7fcdb7f3ff..a616fbc49f 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -1527,7 +1527,7 @@ pub fn isatty(handle: fd_t) bool {
         return system.isatty(handle) != 0;
     }
     if (builtin.os == .wasi) {
-        @compileError("TODO implement std.os.isatty for WASI");
+        return system.isatty(handle);
     }
     if (builtin.os == .linux) {
         var wsz: linux.winsize = undefined;