diff --git a/categories/templatetags/category_tags.py b/categories/templatetags/category_tags.py
index 07255e2..ffede0a 100644
--- a/categories/templatetags/category_tags.py
+++ b/categories/templatetags/category_tags.py
@@ -12,7 +12,7 @@ def get_category(category_string):
     """
     Convert a string, including a path, and return the Category object
     """
-    if category.startswith('"') and category.endswith('"'):
+    if category_string.startswith('"') and category_string.endswith('"'):
         category = category_string[1:-1]
     else:
         category = category_string
@@ -131,4 +131,4 @@ def get_top_level_categories(parser, token):
         raise template.TemplateSyntaxError, "First argyment must be 'as'."
     return TopLevelCategoriesNode(bits[2])
     
-register.tag(get_top_level_categories)
\ No newline at end of file
+register.tag(get_top_level_categories)