diff --git a/Atomic/Dropbox.h b/Atomic/Dropbox.h
index fb0ac73..5967c24 100644
--- a/Atomic/Dropbox.h
+++ b/Atomic/Dropbox.h
@@ -130,7 +130,7 @@ namespace Alepha::Hydrogen::Atomic  ::detail::  Dropbox_m
 				return std::move( rv );
 			}
 
-			bool pushWouldBlock() { return weight > boxLimit; }
+			bool pushWouldBlock() const noexcept { return weight > boxLimit; }
 				
 
 			void