diff --git a/pylib/anki/sync.py b/pylib/anki/sync.py
index 396d8fd1a..84f0a9e9f 100644
--- a/pylib/anki/sync.py
+++ b/pylib/anki/sync.py
@@ -279,7 +279,7 @@ from notes where %s"""
         lim = 250
         while self.tablesLeft and lim:
             curTable = self.tablesLeft[0]
-            if not self.chunkRows:
+            if self.chunkRows is None:
                 self.chunkRows = self.getChunkRows(curTable)
             rows = self.chunkRows[:lim]
             self.chunkRows = self.chunkRows[lim:]