diff --git a/zipstream/__init__.py b/zipstream/__init__.py
index 5d7accd..a086e3a 100644
--- a/zipstream/__init__.py
+++ b/zipstream/__init__.py
@@ -191,7 +191,7 @@ def __exit__(self, type, value, traceback):
 
     def flush(self):
         while self.paths_to_write:
-            kwargs = self.paths_to_write.pop()
+            kwargs = self.paths_to_write.pop(0)
             for data in self.__write(**kwargs):
                 yield data