diff --git a/ANNOUNCE b/ANNOUNCE
index bca801fbe..0ece79787 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -25,7 +25,8 @@ Other information:
 
 Changes since the last public release (1.6.28):
 
-Version 1.6.29 [January 5, 2017]
+Version 1.6.29beta01 [January 5, 2017]
+  Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna).
 
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diff --git a/CHANGES b/CHANGES
index 7bc3d1435..546516580 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5795,6 +5795,7 @@ Version 1.6.28 [January 5, 2017]
   No changes.
 
 Version 1.6.29beta01 [January 5, 2017]
+  Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna).
 
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diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9a1f66e98..22e391865 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,6 +40,8 @@ set(PNGLIB_RELEASE 29)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
+include(GNUInstallDirs)
+
 # needed packages
 
 #Allow users to specify location of Zlib,