diff --git a/src/CHANGELOG b/src/CHANGELOG
index 3bb1a2c6d..a90891664 100644
--- a/src/CHANGELOG
+++ b/src/CHANGELOG
@@ -64,6 +64,9 @@ ECL 1.0:
 
 * Bugs fixed:
 
+ - Lexical environment variables were not marked as volatile and thus they
+   were sometimes clobbered by the C compiler.
+
  - COMPILE-FILE-PATHNAME accepts the same keyword arguments as COMPILE-FILE.
 
  - COMPILER-LET is not standard and belongs in the EXT package. However, it had
diff --git a/src/cmp/cmptop.lsp b/src/cmp/cmptop.lsp
index 5bfc07733..f068648cb 100644
--- a/src/cmp/cmptop.lsp
+++ b/src/cmp/cmptop.lsp
@@ -347,7 +347,7 @@
 ;  (wt-h "#define VU" *reservation-cmacro*)
   (wt-h "#define VLEX" *reservation-cmacro*)
   (when (plusp *max-lex*)
-    (wt-h1 " cl_object lex") (wt-h1 *level*)
+    (wt-h1 " volatile cl_object lex") (wt-h1 *level*)
     (wt-h1 "[") (wt-h1 *max-lex*) (wt-h1 "];"))
   (wt-h "#define CLSR" *reservation-cmacro*)
   (when (plusp *max-env*)
diff --git a/src/lsp/config.lsp.in b/src/lsp/config.lsp.in
index 70b1d64a5..6caac11c9 100644
--- a/src/lsp/config.lsp.in
+++ b/src/lsp/config.lsp.in
@@ -24,7 +24,7 @@ Returns, as a string, the location of the machine on which ECL runs."
 (defun lisp-implementation-version ()
   "Args:()
 Returns the version of your ECL as a string."
-  "@PACKAGE_VERSION@ (CVS 2007-12-20 17:07)")
+  "@PACKAGE_VERSION@ (CVS 2007-12-21 17:58)")
 
 (defun machine-type ()
   "Args: ()