diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 034fa36b68e0..009168be4350 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2000-11-12  Mark Mitchell  <mark@codesourcery.com>
+
+	* config/os/solaris/solaris2.7/bits/os_defines.h: Define
+	__EXTENSIONS__.
+
 Sat Nov 11 20:25:49 2000  Mark P Mitchell  <mark@codesourcery.com>
 
 	* include/bits/basic_file.h (__basic_file): Don't use __c_wfile_type
diff --git a/libstdc++-v3/config/os/solaris/solaris2.7/bits/os_defines.h b/libstdc++-v3/config/os/solaris/solaris2.7/bits/os_defines.h
index f60b48062bd3..91e0261bd95d 100644
--- a/libstdc++-v3/config/os/solaris/solaris2.7/bits/os_defines.h
+++ b/libstdc++-v3/config/os/solaris/solaris2.7/bits/os_defines.h
@@ -34,6 +34,7 @@
 // Need these to get sane definitions, esp. of 64-bit types and typedefs.
 #define _XOPEN_SOURCE        500
 #define _LARGEFILE64_SOURCE  1
+#define __EXTENSIONS__
 
 // These are typedefs which libio assumes are already in place (because
 // they really are, under Linux).