diff --git a/Misc/NEWS b/Misc/NEWS
index 3577735..50a446a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -74,6 +74,10 @@
 Library
 -------
 
+- Issue #26273: Add new :data:`socket.TCP_CONGESTION` (Linux 2.6.13) and
+  :data:`socket.TCP_USER_TIMEOUT` (Linux 2.6.37) constants. Patch written by
+  Omar Sandoval.
+
 - Issue #28752: Restored the __reduce__() methods of datetime objects.
 
 - Issue #28727: Regular expression patterns, _sre.SRE_Pattern objects created
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 4c1d8f0..f4edc06 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -7512,6 +7512,12 @@
 #ifdef  TCP_FASTOPEN
     PyModule_AddIntMacro(m, TCP_FASTOPEN);
 #endif
+#ifdef  TCP_CONGESTION
+    PyModule_AddIntMacro(m, TCP_CONGESTION);
+#endif
+#ifdef  TCP_USER_TIMEOUT
+    PyModule_AddIntMacro(m, TCP_USER_TIMEOUT);
+#endif
 
     /* IPX options */
 #ifdef  IPX_TYPE