diff --git a/repos/base/src/lib/base/heap.cc b/repos/base/src/lib/base/heap.cc
index fbddb84416..f7b77a6906 100644
--- a/repos/base/src/lib/base/heap.cc
+++ b/repos/base/src/lib/base/heap.cc
@@ -282,10 +282,10 @@ void Heap::free(void *addr, size_t)
 		return;
 	}
 
+	_quota_used -= ds->size;
+
 	_ds_pool.remove_and_free(*ds);
 	_alloc->free(ds);
-
-	_quota_used -= ds->size;
 }