Index: src/main.cc
===================================================================
--- src/main.cc	(revision 62ce290a819f55fb97ac23867a84527cc416c5c4)
+++ src/main.cc	(revision 0c0f548dfcc801e54284c7b6f68f8dd6d9b68c3c)
@@ -446,5 +446,5 @@
 }; // description
 
-static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ) );
+static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
 
 static struct Printopts {