diff --git a/src/util/AllocatedArray.hxx b/src/util/AllocatedArray.hxx
index f5bb0fcea..cc79cb219 100644
--- a/src/util/AllocatedArray.hxx
+++ b/src/util/AllocatedArray.hxx
@@ -92,7 +92,8 @@ public:
 	}
 
 	AllocatedArray &operator=(AllocatedArray &&other) noexcept {
-		std::swap(buffer, other.buffer);
+		using std::swap;
+		swap(buffer, other.buffer);
 		return *this;
 	}