diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a08d86861a..9f44d03ca4 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2011-10-28  Alen Skondro  <askondro@gmail.com>
+
+	* ser-tcp.c [USE_WIN32API] (ETIMEOUT): Don't define if already
+	defined.
+
 2011-10-27  Meador Inge  <meadori@codesourcery.com>
 
 	* MAINTAINERS (Write After Approval): Add myself to the list.
diff --git a/gdb/ser-tcp.c b/gdb/ser-tcp.c
index e3d5640504..4f2dcdd0d2 100644
--- a/gdb/ser-tcp.c
+++ b/gdb/ser-tcp.c
@@ -39,7 +39,9 @@
 
 #ifdef USE_WIN32API
 #include <winsock2.h>
+#ifndef ETIMEDOUT
 #define ETIMEDOUT WSAETIMEDOUT
+#endif
 #define close(fd) closesocket (fd)
 #define ioctl ioctlsocket
 #else