diff --git a/src/parsers/bind.c b/src/parsers/bind.c
index 8083c8b..f024a82 100644
--- a/src/parsers/bind.c
+++ b/src/parsers/bind.c
@@ -22,7 +22,7 @@ static void *aa_alloc(HAllocator *allocator, size_t size)
 static void *aa_realloc(HAllocator *allocator, void *ptr, size_t size)
 {
     HArena *arena = ((ArenaAllocator *)allocator)->arena;
-    assert(0);  // XXX realloc for arena allocator
+    assert(((void)"XXX need realloc for arena allocator", 0));
     return NULL;
 }