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diff --git a/README b/README
index d76f13433f3..bca1604b0e1 100644
--- a/README
+++ b/README
@@ -19,6 +19,11 @@ RUNNING
 
 Run ./db and command line options will display.
 
+COMPILER VERSIONS
+
+Mongo has been tested with GCC 4.1.2 and Visual Studio 2008.  Older versions
+of GCC may not be happy.
+
 NOTES
 
 Mongo uses the 10gen appserver and the Java Virtual Machine to execute