diff --git a/test/behavior/ptrcast.zig b/test/behavior/ptrcast.zig
index 1be73e07a1..1bceb89412 100644
--- a/test/behavior/ptrcast.zig
+++ b/test/behavior/ptrcast.zig
@@ -58,6 +58,7 @@ fn testReinterpretStructWrappedBytesAsInteger() !void {
 }
 
 test "reinterpret bytes of an array into an extern struct" {
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO