diff --git a/CHANGES b/CHANGES
index 8c6370ed69..baeec24538 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+4591.	[port]		Addressed some python 3 compatibility issues.
+			Thanks to Ville Skytta. [RT #44955] [RT #44956]
+
 4590.	[bug]		Support for PTHREAD_MUTEX_ADAPTIVE_NP was not being
 			properly detected. [RT #44871]
 
diff --git a/bin/python/isc/coverage.py.in b/bin/python/isc/coverage.py.in
index fe566275bc..809076c23d 100644
--- a/bin/python/isc/coverage.py.in
+++ b/bin/python/isc/coverage.py.in
@@ -81,7 +81,7 @@ def parse_time(s):
         pass
 
     # try to parse as a number with a suffix indicating unit of time
-    r = re.compile('([0-9][0-9]*)\s*([A-Za-z]*)')
+    r = re.compile(r'([0-9][0-9]*)\s*([A-Za-z]*)')
     m = r.match(s)
     if not m:
         raise ValueError("Cannot parse %s" % s)