diff --git a/libs/freetype/src/harfbuzz/buffer.zig b/libs/freetype/src/harfbuzz/buffer.zig
index 6a9164e8..10b5cd97 100644
--- a/libs/freetype/src/harfbuzz/buffer.zig
+++ b/libs/freetype/src/harfbuzz/buffer.zig
@@ -40,6 +40,7 @@ pub const Position = extern struct {
     y_advance: i32,
     x_offset: i32,
     y_offset: i32,
+    _padding: u32, // private
 };
 
 pub const GlyphFlags = packed struct {