diff --git a/parallel/queue.hpp b/parallel/queue.hpp
index 99321afd..46ae8f07 100644
--- a/parallel/queue.hpp
+++ b/parallel/queue.hpp
@@ -52,6 +52,9 @@ namespace util::parallel {
         { ; }
 
 
+        static constexpr auto capacity (void) { return SizeV; }
+
+
         /// attempts to push a value to the queue
         ///
         /// algorithm proceeds as follows: