--- a/src/lib/Helper.hpp	2016-04-21 21:35:42.000000000 +0200
+++ b/src/lib/Helper.hpp	2017-12-31 14:17:46.039358681 +0100
@@ -26,6 +26,10 @@
 
 # define ASSERT_VOID_CAST static_cast<void>
 
+#if !defined(__STRING)
+#define __STRING(x) #x
+#endif
+
 # define assert(expr)							\
   ((expr)								\
    ? ASSERT_VOID_CAST (0)						\
