diff --git a/ANNOUNCE b/ANNOUNCE
index 1beab6e7..404f67af 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -144,6 +144,7 @@ version 1.2.41beta16 [November 9, 2009]
   Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
 
 version 1.2.41beta17 [November 9, 2009]
+  Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
diff --git a/CHANGES b/CHANGES
index 524c5cef..da3a6434 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2575,6 +2575,7 @@ version 1.2.41beta16 [November 9, 2009]
   Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
 
 version 1.2.41beta17 [November 9, 2009]
+  Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ea48c975..13f396b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,6 +116,9 @@ set(pngtest_sources
        pngtest.c
 )
 # SOME NEEDED DEFINITIONS
+
+add_definitions(-DPNG_CONFIGURE_LIBPNG)
+
 if(MSVC)
   add_definitions(-DPNG_NO_MODULEDEF -D_CRT_SECURE_NO_DEPRECATE)
 endif(MSVC)