diff --git a/pdfplumber/page.py b/pdfplumber/page.py
index 1a6a8ba..c5b65b8 100644
--- a/pdfplumber/page.py
+++ b/pdfplumber/page.py
@@ -87,7 +87,7 @@ class Page(Container):
         self.root_page = self
         self.page_obj = page_obj
         self.page_number = page_number
-        _rotation = resolve_all(self.page_obj.attrs.get("Rotate", 0))
+        _rotation = resolve_all(self.page_obj.attrs.get("Rotate", 0)) or 0
         self.rotation = _rotation % 360
         self.page_obj.rotate = self.rotation
         self.initial_doctop = initial_doctop