diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 7e00e2a382b3..f57b699471a4 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,11 @@
+2011-11-02  Richard B. Kreckel  <kreckel@ginac.de>
+	    Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/50880
+	* include/std/complex (__complex_acosh): Fix in a better way,
+	use Kahan's formula.
+	* include/tr1/complex (__complex_acosh): Likewise.
+
 2011-11-02  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR libstdc++/50951