diff -Nru libreoffice-5.1.2/debian/changelog libreoffice-5.1.2/debian/changelog
--- libreoffice-5.1.2/debian/changelog	2016-04-05 12:31:17.000000000 +0000
+++ libreoffice-5.1.2/debian/changelog	2016-04-23 14:33:18.000000000 +0000
@@ -1,3 +1,15 @@
+libreoffice (1:5.1.2-0ubuntu3) yakkety; urgency=medium
+
+  * (Build-)depend on libpng-dev.
+
+ -- Matthias Klose <doko@ubuntu.com>  Sat, 23 Apr 2016 16:32:52 +0200
+
+libreoffice (1:5.1.2-0ubuntu2) yakkety; urgency=medium
+
+  * No-change rebuild for libicu soname change.
+
+ -- Matthias Klose <doko@ubuntu.com>  Fri, 22 Apr 2016 22:57:08 +0000
+
 libreoffice (1:5.1.2-0ubuntu1) xenial; urgency=medium
 
   * new upstream bugfix release
diff -Nru libreoffice-5.1.2/debian/control libreoffice-5.1.2/debian/control
--- libreoffice-5.1.2/debian/control	2016-04-05 12:43:35.000000000 +0000
+++ libreoffice-5.1.2/debian/control	2016-04-23 14:32:43.000000000 +0000
@@ -22,8 +22,8 @@
                flex (>= 2.3.35),
                fontconfig,
                fonts-liberation,
-               g++-5 [hppa ia64 s390 sparc],
-               gcc-5 [hppa ia64 s390 sparc],
+               g++-6.0 [hppa ia64 s390 sparc],
+               gcc-6.0 [hppa ia64 s390 sparc],
                gcj-jdk [hppa ia64 s390 sparc],
                gcj-native-helper [hppa ia64 s390 sparc],
                gdb,
@@ -90,7 +90,7 @@
                libodfgen-dev (>= 0.1),
                liborcus-dev (>= 0.9.2-2),
                libpagemaker-dev,
-               libpng12-dev,
+               libpng-dev,
                libpoppler-cpp-dev,
                libpoppler-dev (>= 0.12.0),
                libpoppler-private-dev,
@@ -1359,7 +1359,7 @@
          libodfgen-dev (>= 0.1),
          liborcus-dev (>= 0.9.2-2),
          libpagemaker-dev,
-         libpng12-dev,
+         libpng-dev,
          libpoppler-cpp-dev,
          libpoppler-dev (>= 0.12.0),
          libpoppler-private-dev,
diff -Nru libreoffice-5.1.2/debian/rules libreoffice-5.1.2/debian/rules
--- libreoffice-5.1.2/debian/rules	2016-04-05 12:31:17.000000000 +0000
+++ libreoffice-5.1.2/debian/rules	2016-04-23 14:32:40.000000000 +0000
@@ -870,7 +870,7 @@
        BUILD_DEPS += , libsane-dev
 endif
 ifneq (,$(filter libpng, $(SYSTEM_STUFF)))
-       BUILD_DEPS += , libpng12-dev
+       BUILD_DEPS += , libpng-dev
 endif
 
 ifneq (,$(filter curl, $(SYSTEM_STUFF)))