diff --git a/poky/meta/lib/oe/patch.py b/poky/meta/lib/oe/patch.py
index e0f0604..7dd31d9 100644
--- a/poky/meta/lib/oe/patch.py
+++ b/poky/meta/lib/oe/patch.py
@@ -334,8 +334,8 @@
     @staticmethod
     def interpretPatchHeader(headerlines):
         import re
-        author_re = re.compile('[\S ]+ <\S+@\S+\.\S+>')
-        from_commit_re = re.compile('^From [a-z0-9]{40} .*')
+        author_re = re.compile(r'[\S ]+ <\S+@\S+\.\S+>')
+        from_commit_re = re.compile(r'^From [a-z0-9]{40} .*')
         outlines = []
         author = None
         date = None
@@ -790,9 +790,11 @@
 
 
 def patch_path(url, fetch, workdir, expand=True):
-    """Return the local path of a patch, or None if this isn't a patch"""
+    """Return the local path of a patch, or return nothing if this isn't a patch"""
 
     local = fetch.localpath(url)
+    if os.path.isdir(local):
+        return
     base, ext = os.path.splitext(os.path.basename(local))
     if ext in ('.gz', '.bz2', '.xz', '.Z'):
         if expand: