Minor
diff --git a/src/hb-atomic-private.hh b/src/hb-atomic-private.hh
index 60b319a..a348f95 100644
--- a/src/hb-atomic-private.hh
+++ b/src/hb-atomic-private.hh
@@ -39,8 +39,10 @@
/* We need external help for these */
+#if 0
-#if !defined(HB_NO_MT) && defined(_MSC_VER) && _MSC_VER >= 1600
+
+#elif !defined(HB_NO_MT) && defined(_MSC_VER) && _MSC_VER >= 1600
#include <intrin.h>
typedef long hb_atomic_int_t;
diff --git a/src/hb-mutex-private.hh b/src/hb-mutex-private.hh
index bdb438f..44b48df 100644
--- a/src/hb-mutex-private.hh
+++ b/src/hb-mutex-private.hh
@@ -39,8 +39,10 @@
/* We need external help for these */
+#if 0
-#if !defined(HB_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__)
+
+#elif !defined(HB_NO_MT) && defined(_MSC_VER) || defined(__MINGW32__)
#include <windows.h>
typedef CRITICAL_SECTION hb_mutex_impl_t;