diff --git a/CHANGES b/CHANGES
index b383bb87..a74ad81e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5,6 +5,9 @@ What's New for OpenJPEG
 ! : changed
 + : added
 
+July 21, 2011
+! [mickael] removed unused warning configuration message
+
 July 18, 2011
 ! [mickael] correct build error (mislocated declaration) with convert to tiff function when HAVE_LIBTIFF is defined
 
diff --git a/thirdparty/CMakeLists.txt b/thirdparty/CMakeLists.txt
index c779ff95..b129d0e5 100644
--- a/thirdparty/CMakeLists.txt
+++ b/thirdparty/CMakeLists.txt
@@ -65,9 +65,6 @@ IF (ZLIB_FOUND)
     ENDIF(BUILD_THIRDPARTY) 
 
   ENDIF(PNG_FOUND)
-  
-ELSE (ZLIB_FOUND)
-  message(WARNING "To add lib PNG we need that ZLIB was previously found")
 ENDIF (ZLIB_FOUND)
 
 #------------