diff --git a/gcc/lto/ChangeLog b/gcc/lto/ChangeLog
index 501bf8a7ee33..bc2ffa56c9d1 100644
--- a/gcc/lto/ChangeLog
+++ b/gcc/lto/ChangeLog
@@ -1,3 +1,8 @@
+2010-10-20  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR bootstrap/45954
+	* config-lang.in (boot_language): Set to $enable_lto.
+
 2010-10-18  Jakub Jelinek  <jakub@redhat.com>
 
 	PR lto/45638
diff --git a/gcc/lto/config-lang.in b/gcc/lto/config-lang.in
index aa84db1e79f3..72ed2dd9cfea 100644
--- a/gcc/lto/config-lang.in
+++ b/gcc/lto/config-lang.in
@@ -30,3 +30,6 @@ gtfiles="\$(srcdir)/lto/lto-tree.h \$(srcdir)/lto/lto-lang.c \$(srcdir)/lto/lto.
 # enabling this "language". To enable LTO functionality, use
 # --enable-lto when configuring the compiler.
 build_by_default=no
+
+# Add LTO to boot language if it is enabled.
+boot_language=$enable_lto