diff --git a/flake8/defaults.py b/flake8/defaults.py
index 62939b5..d484f4c 100644
--- a/flake8/defaults.py
+++ b/flake8/defaults.py
@@ -1,7 +1,7 @@
 """Constants that define defaults."""
 
 EXCLUDE = '.svn,CVS,.bzr,.hg,.git,__pycache__,.tox'
-IGNORE = 'E121,E123,E126,E226,E24,E704'
+IGNORE = 'E121,E123,E126,E226,E24,E704,W503,W504'
 MAX_LINE_LENGTH = 79
 
 # Other consants