diff --git a/src/cuda/api/detail/unique_span.hpp b/src/cuda/api/detail/unique_span.hpp
index 65c0d5e0..8c30ed1b 100644
--- a/src/cuda/api/detail/unique_span.hpp
+++ b/src/cuda/api/detail/unique_span.hpp
@@ -143,7 +143,9 @@ class unique_span : public ::cuda::span<T> {
 	/// Exchange the pointer and deleter with another object.
 	void swap(unique_span& other) noexcept
 	{
-		::std::swap<span_type>(*this, other);
+		using ::std::swap;
+		swap<span_type>(*this, other);
+		swap(deleter_, other.deleter_);
 	}
 	/**
 	 * Release ownership of the stored span