diff --git a/ChangeLog b/ChangeLog
index bf2f9318a..de168a73a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-02-27  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* configure.ac: Put platform and target_cpu substitutions back since
+	they are used for directories.
+
 2012-02-27  Richard Laager <rlaager@wiktel.com>
 2012-02-27  Vladimir Serbinenko  <phcoder@gmail.com>
 
diff --git a/configure.ac b/configure.ac
index 623938f50..2663563e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,6 +186,9 @@ AC_SUBST(host_cpu)
 AC_SUBST(host_os)
 AC_SUBST(host_kernel)
 
+AC_SUBST(target_cpu)
+AC_SUBST(platform)
+
 # Define default variables
 
 have_with_bootdir=n