diff --git a/lib/defines.h b/lib/defines.h
index 5ef11c02..c285e119 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -222,10 +222,12 @@ static inline void memzero(void *ptr, size_t size)
 
 /* To be used for verified unused parameters */
 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-# define unused __attribute__((unused))
+# define unused    __attribute__((unused))
+# define NORETURN  __attribute__((__noreturn__))
 # define format_attr(type, index, check) __attribute__((format (type, index, check)))
 #else
 # define unused
+# define NORETURN
 # define format_attr(type, index, check)
 #endif