diff --git a/main.py b/main.py
index 2ece725..22145fe 100644
--- a/main.py
+++ b/main.py
@@ -21,17 +21,27 @@ def readfile(filename):
 
 # module object classes
 class ModuleV1:
-    def __init__(self, path, code, enabled, alias):
+    def __init__(self, path, code, enabled, alias, predefine):
         self.version = 1
         self.enabled = enabled
         self.code = code
         self.alias = alias
         self.path = path
+        self.predefine = predefine
+
+        if self.predefine:
+            self.predefine()
 
     # set environmental variables
     def set_env(self):
         self.RESPONCE = ""
 
+    def predefine(self):
+        try:
+            exec(self.predefine)
+        except Exception as e:
+            print("[ERROR] module: module \"{}\" ({}) raised exception \"{}\" during predefine stage, disabling it...".format(self.path, self.alias, e))
+
     # running the module
     def process(self, msg):
         self.set_env()
@@ -83,7 +93,12 @@ class ModuleControlUnit:
                         else:
                             alias = None
 
-                        self.modules.append( ModuleV1( "modules/{}/".format(folder), code, enabled, alias ) )
+                        if "predefine" in meta:
+                            predefine = readfile("modules/{}/{}".format(folder, meta["predefine"]))
+                        else:
+                            predefine = False
+
+                        self.modules.append( ModuleV1( "modules/{}/".format(folder), code, enabled, alias, predefine ) )
 
                         print("[INFO] reload_modules: successfully loaded {} as {} (start_on_boot: {})".format(folder, alias, enabled))
                     else: