diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 71edd6af3c6..ecfa31197e7 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2001-02-15  Benjamin Kosnik  <bkoz@redhat.com>
+
+	* include/bits/c++config: Revert.
+
 2001-02-15  Mark Mitchell  <mark@codesourcery.com>
 
 	* include/bits/istream.tcc: Use ios_base::iostate in place of
diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config
index 17263b1a1ee..c76ce2dac76 100644
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -47,7 +47,7 @@
 // types. For the io library, this means that larger, out-of-line
 // member functions are only declared, and definitions are not parsed
 // by the compiler, but instead instantiated into the library binary.
-#define _GLIBCPP_FULLY_COMPLIANT_HEADERS 1
+// #define _GLIBCPP_FULLY_COMPLIANT_HEADERS 1
 
 // To enable older, ARM-style iostreams and other anachronisms use this.
 //#define _GLIBCPP_DEPRECATED 1