diff --git a/poky/scripts/lib/checklayer/__init__.py b/poky/scripts/lib/checklayer/__init__.py
index 8271ed7..62ecdfe 100644
--- a/poky/scripts/lib/checklayer/__init__.py
+++ b/poky/scripts/lib/checklayer/__init__.py
@@ -324,8 +324,8 @@
         else:
             raise
 
-    sig_regex = re.compile("^(?P<task>.*:.*):(?P<hash>.*) .$")
-    tune_regex = re.compile("(^|\s)SIGGEN_LOCKEDSIGS_t-(?P<tune>\S*)\s*=\s*")
+    sig_regex = re.compile(r"^(?P<task>.*:.*):(?P<hash>.*) .$")
+    tune_regex = re.compile(r"(^|\s)SIGGEN_LOCKEDSIGS_t-(?P<tune>\S*)\s*=\s*")
     current_tune = None
     with open(sigs_file, 'r') as f:
         for line in f.readlines():