--- a/libs/type_safe/external/debug_assert/debug_assert.hpp	2019-09-01 18:30:08.678602564 +1000
+++ b/libs/type_safe/external/debug_assert/debug_assert.hpp	2018-11-26 02:45:47.000000000 +1100
@@ -53,11 +53,7 @@
 
 #ifndef DEBUG_ASSERT_PURE_FUNCTION
 #ifdef __GNUC__
-#if (__GNUC__ > 8)
-#define DEBUG_ASSERT_PURE_FUNCTION [[gnu::pure]]
-#else
 #define DEBUG_ASSERT_PURE_FUNCTION __attribute__((pure))
-#endif
 #else
 /// Hint to the compiler that a function is pure.
 #define DEBUG_ASSERT_PURE_FUNCTION