diff --git a/scrapy/linkextractors/__init__.py b/scrapy/linkextractors/__init__.py
index 64efa0c55..efb11e43c 100644
--- a/scrapy/linkextractors/__init__.py
+++ b/scrapy/linkextractors/__init__.py
@@ -30,7 +30,8 @@ IGNORED_EXTENSIONS = [
     'm4a',
 
     # office suites
-    'xls', 'xlsx', 'ppt', 'pptx', 'doc', 'docx', 'odt', 'ods', 'odg', 'odp',
+    'xls', 'xlsx', 'ppt', 'pptx', 'pps', 'doc', 'docx', 'odt', 'ods', 'odg',
+    'odp',
 
     # other
     'css', 'pdf', 'exe', 'bin', 'rss', 'zip', 'rar',