diff --git a/debian/changelog b/debian/changelog
index 1f8dad586..db1bc4b35 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -8,6 +8,7 @@ linux (4.19~rc3-1~exp2) UNRELEASED; urgency=medium
   * debian/control: Build-depend on libnuma-dev for linux-perf on all arches
   * debian/control: Remove "cross" from profiles for build-dep on libssl-dev
   * [mips64*] debian/control: Build-depend on gcc-multilib for linux-perf
+  * debian/lib/python: Use raw strings for all regexes
 
  -- Ben Hutchings <ben@decadent.org.uk>  Mon, 10 Sep 2018 22:25:53 +0100
 
diff --git a/debian/lib/python/debian_linux/config.py b/debian/lib/python/debian_linux/config.py
index 004469af8..4106a7d55 100644
--- a/debian/lib/python/debian_linux/config.py
+++ b/debian/lib/python/debian_linux/config.py
@@ -34,7 +34,7 @@ class SchemaItemInteger(object):
 
 
 class SchemaItemList(object):
-    def __init__(self, type="\s+"):
+    def __init__(self, type=r"\s+"):
         self.type = type
 
     def __call__(self, i):
diff --git a/debian/lib/python/debian_linux/debian.py b/debian/lib/python/debian_linux/debian.py
index afc956ef0..b67678d05 100644
--- a/debian/lib/python/debian_linux/debian.py
+++ b/debian/lib/python/debian_linux/debian.py
@@ -421,7 +421,7 @@ class PackageArchitecture(collections.MutableSet):
 
     def extend(self, value):
         if isinstance(value, str):
-            for i in re.split('\s', value.strip()):
+            for i in re.split(r'\s', value.strip()):
                 self.add(i)
         else:
             raise RuntimeError
@@ -493,7 +493,7 @@ class PackageRelation(list):
 
     def extend(self, value, override_arches=None):
         if isinstance(value, str):
-            value = (j.strip() for j in re.split(',', value.strip()))
+            value = (j.strip() for j in re.split(r',', value.strip()))
         for i in value:
             self.append(i, override_arches)
 
@@ -529,7 +529,7 @@ class PackageRelationGroup(list):
 
     def extend(self, value, override_arches=None):
         if isinstance(value, str):
-            value = (j.strip() for j in re.split('\|', value.strip()))
+            value = (j.strip() for j in re.split(r'\|', value.strip()))
         for i in value:
             self.append(i, override_arches)
 
@@ -612,11 +612,11 @@ class PackageRelationEntry(object):
             self.operator = None
         self.version = match[2]
         if match[3] is not None:
-            self.arches = re.split('\s+', match[3])
+            self.arches = re.split(r'\s+', match[3])
         else:
             self.arches = []
         if match[4] is not None:
-            self.restrictions = re.split('\s+', match[4])
+            self.restrictions = re.split(r'\s+', match[4])
         else:
             self.restrictions = []