diff --git a/ANNOUNCE b/ANNOUNCE
index 1beab6e70239df5ebc470afdc15105d2221c44d5..404f67af522c7be24eb9b9fdd9251598cbf2a4aa 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 524c5cefa86564fc3873348b507bec963afb3d33..da3a6434e5c2f09ada8c5826a64e23df020ad53c 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
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diff --git a/CMakeLists.txt b/CMakeLists.txt
index ea48c97501f7f20522bc75c4772cc0705600a38c..13f396b4747386bc8f98af631967664834393c37 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)