diff --git a/cocos/CMakeLists.txt b/cocos/CMakeLists.txt
index 940dd5e6aa..dcaedf98de 100644
--- a/cocos/CMakeLists.txt
+++ b/cocos/CMakeLists.txt
@@ -151,7 +151,7 @@ set_target_properties(${ENGINEX_CORE_LIB}
                       PROPERTIES
                       ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
                       LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-                      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+                      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
                       VERSION "${ENGINEX_VERSION}"
                       FOLDER "Internal"
                       )
diff --git a/extensions/CMakeLists.txt b/extensions/CMakeLists.txt
index a3c9d58632..8ed7a91162 100644
--- a/extensions/CMakeLists.txt
+++ b/extensions/CMakeLists.txt
@@ -48,7 +48,7 @@ function(setup_cocos_extension_config target_name)
       PROPERTIES
       ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
       LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
       FOLDER "Extensions"
   )
 
diff --git a/extensions/scripting/lua-bindings/script/init.lua b/extensions/scripting/lua-bindings/script/init.lua
index 670609c77e..6c8eeb20ba 100644
--- a/extensions/scripting/lua-bindings/script/init.lua
+++ b/extensions/scripting/lua-bindings/script/init.lua
@@ -22,12 +22,6 @@ THE SOFTWARE.
 
 ]]
 
-if (math.pow == nil) then
-    math.pow = function (x,y)
-        return x ^ y
-    end
-end
-
 require "cocos.cocos2d.Cocos2d"
 require "cocos.cocos2d.Cocos2dConstants"
 require "cocos.cocos2d.functions"