diff --git a/cmake/externals/bullet/CMakeLists.txt b/cmake/externals/bullet/CMakeLists.txt
index 38bf031387..e46cb093d4 100644
--- a/cmake/externals/bullet/CMakeLists.txt
+++ b/cmake/externals/bullet/CMakeLists.txt
@@ -48,7 +48,7 @@ elseif (WIN32)
   set(BULLET_LIB_EXT "lib")
 endif ()
 
-if (DEFINED SHARED_LIB_EXT)
+if (DEFINED BULLET_LIB_EXT)
   set(${EXTERNAL_NAME_UPPER}_DYNAMICS_LIBRARY_RELEASE ${BULLET_LIB_DIR}/${LIB_PREFIX}BulletDynamics.${BULLET_LIB_EXT} CACHE TYPE "Bullet dynamics release library location")
   set(${EXTERNAL_NAME_UPPER}_DYNAMICS_LIBRARY_DEBUG NOTFOUND CACHE TYPE "Bullet dynamics debug library location")
 
diff --git a/cmake/modules/FindZLIB.cmake b/cmake/modules/FindZLIB.cmake
index f052939d04..e6212247b3 100644
--- a/cmake/modules/FindZLIB.cmake
+++ b/cmake/modules/FindZLIB.cmake
@@ -135,10 +135,11 @@ if(ZLIB_INCLUDE_DIR AND EXISTS "${ZLIB_INCLUDE_DIR}/zlib.h")
     set(ZLIB_PATCH_VERSION "${ZLIB_VERSION_PATCH}")
 endif()
 
-set(ZLIB_REQUIREMENTS ZLIB_LIBRARY ZLIB_INCLUDE_DIR VERSION_VAR ZLIB_VERSION_STRING)
+set(ZLIB_REQUIREMENTS ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
 if (WIN32)
   list(APPEND ZLIB_REQUIREMENTS ZLIB_DLL_PATH)
 endif ()
+list(APPEND ZLIB_REQUIREMENTS VERSION_VAR ZLIB_VERSION_STRING)
 
 # handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if
 # all listed variables are TRUE