diff --git a/proc_terminator/1.0.0/cmodule/main.lua b/proc_terminator/1.0.0/cmodule/main.lua
index 208540d..2d5c916 100644
--- a/proc_terminator/1.0.0/cmodule/main.lua
+++ b/proc_terminator/1.0.0/cmodule/main.lua
@@ -5,9 +5,10 @@ local cjson   = require("cjson.safe")
 local luapath = require("path")
 local process_api = require("process_api")
 local lk32
+local win_const = {}
 if ffi.os == "Windows" then
     lk32 = require("waffi.windows.kernel32")
-    lk32.STILL_ALIVE = 259
+    win_const.STILL_ALIVE = 259
 else
     ffi.cdef[[
         typedef uint32_t pid_t;
@@ -338,7 +339,7 @@ if ffi.os == "Windows" then
         elseif lk32.GetExitCodeProcess(proc_handle, exitCode) ~= 0 then
             __log.debugf("exit code from requested kill process: %d", tonumber(exitCode[0]))
 
-            if tonumber(exitCode[0]) ~= lk32.STILL_ALIVE then
+            if tonumber(exitCode[0]) ~= win_const.STILL_ALIVE then
                 action_data.data.result = true
                 action_data.data.reason = "already terminating"
                 push_event("pt_" .. object_type .. "_process_killed_successful", action_name, action_data)
diff --git a/proc_terminator/1.0.0/cmodule/process_api.lua b/proc_terminator/1.0.0/cmodule/process_api.lua
index 52ca3c3..11e6119 100644
--- a/proc_terminator/1.0.0/cmodule/process_api.lua
+++ b/proc_terminator/1.0.0/cmodule/process_api.lua
@@ -4,10 +4,11 @@ local ffi     = require("ffi")
 local lfs     = require("lfs")
 local luapath = require("path")
 local lk32
+local win_const = {}
 if ffi.os == "Windows" then
     lk32 = require("waffi.windows.kernel32")
-    lk32.TH32CS_SNAPPROCESS = 0x00000002
-    lk32.SYNCHRONIZE = 0x00100000
+    win_const.TH32CS_SNAPPROCESS = 0x00000002
+    win_const.SYNCHRONIZE = 0x00100000
 else
     ffi.cdef[[
         typedef uint32_t pid_t;
@@ -53,7 +54,7 @@ if ffi.os == "Windows" then
 
         local proc_entry = ffi.new("PROCESSENTRY32[1]")
         proc_entry[0].dwSize = ffi.sizeof("PROCESSENTRY32")
-        local snap_handle = lk32.CreateToolhelp32Snapshot(lk32.TH32CS_SNAPPROCESS, 0)
+        local snap_handle = lk32.CreateToolhelp32Snapshot(win_const.TH32CS_SNAPPROCESS, 0)
 
         if (lk32.Process32First(snap_handle, proc_entry[0]) == 1) then
             while (lk32.Process32Next(snap_handle, proc_entry[0]) == 1) do
@@ -85,7 +86,7 @@ if ffi.os == "Windows" then
 
     function api.windows.get_process_handle(pid)
         local handle = lk32.OpenProcess(bit.bor(lk32.PROCESS_QUERY_LIMITED_INFORMATION, lk32.PROCESS_TERMINATE,
-            lk32.PROCESS_VM_READ, lk32.SYNCHRONIZE
+            lk32.PROCESS_VM_READ, win_const.SYNCHRONIZE
         ), false, pid)
         if handle == ffi.NULL then
             return nil, api.windows.get_last_error()