diff --git a/Documentation/guides/application-developer.rst b/Documentation/guides/application-developer.rst
index 3de13060db08..41a7d88369be 100644
--- a/Documentation/guides/application-developer.rst
+++ b/Documentation/guides/application-developer.rst
@@ -278,7 +278,7 @@ as the parameter of the ``FrameBufferAllocator::buffers()`` function.
            return -ENOMEM;
        }
 
-       unsigned int allocated = allocator->buffers(cfg.stream()).size();
+       size_t allocated = allocator->buffers(cfg.stream()).size();
        std::cout << "Allocated " << allocated << " buffers for stream" << std::endl;
    }