diff -Nru matplotlib-1.5.1/debian/changelog matplotlib-1.5.1/debian/changelog
--- matplotlib-1.5.1/debian/changelog	2016-03-21 21:39:36.000000000 +0000
+++ matplotlib-1.5.1/debian/changelog	2016-04-23 00:51:13.000000000 +0000
@@ -1,3 +1,9 @@
+matplotlib (1.5.1-1ubuntu2) yakkety; urgency=medium
+
+  * No-change rebuild for libpng soname change.
+
+ -- Matthias Klose <doko@ubuntu.com>  Sat, 23 Apr 2016 00:51:13 +0000
+
 matplotlib (1.5.1-1ubuntu1) xenial; urgency=low
 
   * Merge from Debian unstable.  Remaining changes: