diff --git a/config/ChangeLog b/config/ChangeLog
index 83273a0816..81126637d4 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -22,6 +22,10 @@
 	* bootstrap-asan.mk (POSTSTAGE1_LDFLAGS): Add
 	-B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/asan/.
 
+2013-01-23  Shenghou Ma  <minux.ma@gmail.com>
+
+	* isl.m4: don't echo $CFLAGS for ISL_CHECK_VERSION.
+
 2013-01-15  Richard Biener  <rguenther@suse.de>
 
 	PR other/55973