diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index 9f2c0f0c58a39e..a75bc50a4a27e0 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -1647,7 +1647,7 @@ def __init__(self, logger, extra):
         adapter = LoggerAdapter(someLogger, dict(p1=v1, p2="v2"))
         """
         self.logger = logger
-        self.extra = extra
+        self.extra = extra or {}
 
     def process(self, msg, kwargs):
         """
@@ -1659,7 +1659,7 @@ def process(self, msg, kwargs):
         Normally, you'll only need to override this one method in a
         LoggerAdapter subclass for your specific needs.
         """
-        kwargs["extra"] = self.extra
+        kwargs["extra"] = { **self.extra, **(kwargs.get("extra", {})) }
         return msg, kwargs
 
     #
diff --git a/Misc/NEWS.d/next/Library/2018-01-31-19-56-00.bpo-32732.mcOOli.rst b/Misc/NEWS.d/next/Library/2018-01-31-19-56-00.bpo-32732.mcOOli.rst
new file mode 100644
index 00000000000000..3b0af3dc6081cd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-01-31-19-56-00.bpo-32732.mcOOli.rst
@@ -0,0 +1 @@
+Do not ignore extra in logging method when a LoggerAdapter is configured. Patch by Cyril Martin