diff --git a/src/hb-private.hh b/src/hb-private.hh
index 6893bfd35699fa8f2905033fef363f1e137369aa..8609e04a8c6f3bb7e508f624c637d888d2938765 100644
--- a/src/hb-private.hh
+++ b/src/hb-private.hh
@@ -103,7 +103,7 @@ extern "C" void  hb_free_impl(void *ptr);
 #endif
 
 #ifndef alignof
-#define alignof(x) _hb_alignof<x>::value;
+#define alignof(x) (_hb_alignof<x>::value)
 template <typename T>
 struct _hb_alignof
 {