diff --git a/judge/models/problem.py b/judge/models/problem.py
index 875b072..59017f9 100644
--- a/judge/models/problem.py
+++ b/judge/models/problem.py
@@ -559,9 +559,10 @@ class Problem(models.Model):
         return result
 
     def save(self, *args, **kwargs):
-        self.pdf_description.name = problem_directory_file_helper(
-            self.code, self.pdf_description.name
-        )
+        if self.pdf_description:
+            self.pdf_description.name = problem_directory_file_helper(
+                self.code, self.pdf_description.name
+            )
         super(Problem, self).save(*args, **kwargs)
         if self.code != self.__original_code:
             try: