diff --git a/include/openssl/type_check.h b/include/openssl/type_check.h
index 7e70918b..a6f8284f 100644
--- a/include/openssl/type_check.h
+++ b/include/openssl/type_check.h
@@ -78,13 +78,9 @@ extern "C" {
 
 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
 #define OPENSSL_COMPILE_ASSERT(cond, msg) _Static_assert(cond, #msg)
-#elif defined(__GNUC__)
-#define OPENSSL_COMPILE_ASSERT(cond, msg)                      \
-  typedef char OPENSSL_COMPILE_ASSERT_##msg[((cond) ? 1 : -1)] \
-      __attribute__((unused))
 #else
 #define OPENSSL_COMPILE_ASSERT(cond, msg) \
-  typedef char OPENSSL_COMPILE_ASSERT_##msg[((cond) ? 1 : -1)]
+  typedef char OPENSSL_COMPILE_ASSERT_##msg[((cond) ? 1 : -1)] OPENSSL_UNUSED
 #endif