diff --git a/Modules/FindPNG.cmake b/Modules/FindPNG.cmake
index 4fb218b68..6d5dd9870 100644
--- a/Modules/FindPNG.cmake
+++ b/Modules/FindPNG.cmake
@@ -33,7 +33,7 @@ if(ZLIB_FOUND)
   /usr/local/include/libpng             # OpenBSD
   )
 
-  set(PNG_NAMES ${PNG_NAMES} png libpng png14 libpng14 png14d libpng14d png12 libpng12 png12d libpng12d)
+  set(PNG_NAMES ${PNG_NAMES} png libpng png15 libpng15 png15d libpng15d png14 libpng14 png14d libpng14d png12 libpng12 png12d libpng12d)
   find_library(PNG_LIBRARY NAMES ${PNG_NAMES} )
 
   if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
diff --git a/Modules/FindZLIB.cmake b/Modules/FindZLIB.cmake
index 1ac6c2c0e..3de5829d2 100644
--- a/Modules/FindZLIB.cmake
+++ b/Modules/FindZLIB.cmake
@@ -35,7 +35,7 @@ FIND_PATH(ZLIB_INCLUDE_DIR zlib.h
     "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/include"
 )
 
-SET(ZLIB_NAMES z zlib zdll)
+SET(ZLIB_NAMES z zlib zdll zlib1 zlibd zlibd1)
 FIND_LIBRARY(ZLIB_LIBRARY
     NAMES
         ${ZLIB_NAMES}