diff --git a/src/hb-algs.hh b/src/hb-algs.hh
index 5b9c14e62..71f28434e 100644
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -35,6 +35,42 @@
 #include "hb-number.hh"
 
 
+/* Flags */
+
+/* Enable bitwise ops on enums marked as flags_t */
+/* To my surprise, looks like the function resolver is happy to silently cast
+ * one enum to another...  So this doesn't provide the type-checking that I
+ * originally had in mind... :(.
+ *
+ * For MSVC warnings, see: https://github.com/harfbuzz/harfbuzz/pull/163
+ */
+#ifdef _MSC_VER
+# pragma warning(disable:4200)
+# pragma warning(disable:4800)
+#endif
+#define HB_MARK_AS_FLAG_T(T) \
+	extern "C++" { \
+	  static inline constexpr T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
+	  static inline constexpr T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
+	  static inline constexpr T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
+	  static inline constexpr T operator ~ (T r) { return T (~(unsigned int) r); } \
+	  static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
+	  static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
+	  static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
+	} \
+	static_assert (true, "")
+
+/* Useful for set-operations on small enums.
+ * For example, for testing "x ∈ {x1, x2, x3}" use:
+ * (FLAG_UNSAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
+ */
+#define FLAG(x) (static_assert_expr ((unsigned)(x) < 32) + (((uint32_t) 1U) << (unsigned)(x)))
+#define FLAG_UNSAFE(x) ((unsigned)(x) < 32 ? (((uint32_t) 1U) << (unsigned)(x)) : 0)
+#define FLAG_RANGE(x,y) (static_assert_expr ((x) < (y)) + FLAG(y+1) - FLAG(x))
+#define FLAG64(x) (static_assert_expr ((unsigned)(x) < 64) + (((uint64_t) 1ULL) << (unsigned)(x)))
+#define FLAG64_UNSAFE(x) ((unsigned)(x) < 64 ? (((uint64_t) 1ULL) << (unsigned)(x)) : 0)
+
+
 /* Encodes three unsigned integers in one 64-bit number.  If the inputs have more than 21 bits,
  * values will be truncated / overlap, and might not decode exactly. */
 #define HB_CODEPOINT_ENCODE3(x,y,z) (((uint64_t) (x) << 42) | ((uint64_t) (y) << 21) | (uint64_t) (z))
diff --git a/src/hb.hh b/src/hb.hh
index a8a22ae8b..eab1cdb0c 100644
--- a/src/hb.hh
+++ b/src/hb.hh
@@ -464,42 +464,6 @@ static_assert ((sizeof (hb_var_int_t) == 4), "");
   void operator=(const TypeName&) = delete
 
 
-/* Flags */
-
-/* Enable bitwise ops on enums marked as flags_t */
-/* To my surprise, looks like the function resolver is happy to silently cast
- * one enum to another...  So this doesn't provide the type-checking that I
- * originally had in mind... :(.
- *
- * For MSVC warnings, see: https://github.com/harfbuzz/harfbuzz/pull/163
- */
-#ifdef _MSC_VER
-# pragma warning(disable:4200)
-# pragma warning(disable:4800)
-#endif
-#define HB_MARK_AS_FLAG_T(T) \
-	extern "C++" { \
-	  static inline constexpr T operator | (T l, T r) { return T ((unsigned) l | (unsigned) r); } \
-	  static inline constexpr T operator & (T l, T r) { return T ((unsigned) l & (unsigned) r); } \
-	  static inline constexpr T operator ^ (T l, T r) { return T ((unsigned) l ^ (unsigned) r); } \
-	  static inline constexpr T operator ~ (T r) { return T (~(unsigned int) r); } \
-	  static inline T& operator |= (T &l, T r) { l = l | r; return l; } \
-	  static inline T& operator &= (T& l, T r) { l = l & r; return l; } \
-	  static inline T& operator ^= (T& l, T r) { l = l ^ r; return l; } \
-	} \
-	static_assert (true, "")
-
-/* Useful for set-operations on small enums.
- * For example, for testing "x ∈ {x1, x2, x3}" use:
- * (FLAG_UNSAFE(x) & (FLAG(x1) | FLAG(x2) | FLAG(x3)))
- */
-#define FLAG(x) (static_assert_expr ((unsigned)(x) < 32) + (((uint32_t) 1U) << (unsigned)(x)))
-#define FLAG_UNSAFE(x) ((unsigned)(x) < 32 ? (((uint32_t) 1U) << (unsigned)(x)) : 0)
-#define FLAG_RANGE(x,y) (static_assert_expr ((x) < (y)) + FLAG(y+1) - FLAG(x))
-#define FLAG64(x) (static_assert_expr ((unsigned)(x) < 64) + (((uint64_t) 1ULL) << (unsigned)(x)))
-#define FLAG64_UNSAFE(x) ((unsigned)(x) < 64 ? (((uint64_t) 1ULL) << (unsigned)(x)) : 0)
-
-
 /* Size signifying variable-sized array */
 #ifndef HB_VAR_ARRAY
 #define HB_VAR_ARRAY 1