diff --git a/src/Bindings/LuaState.cpp b/src/Bindings/LuaState.cpp
index 0d958cc20..109809cab 100644
--- a/src/Bindings/LuaState.cpp
+++ b/src/Bindings/LuaState.cpp
@@ -553,7 +553,7 @@ bool cLuaState::PushFunction(const char * a_FunctionName)
 
 
 
-bool cLuaState::PushFunction(int a_FnRef)
+bool cLuaState::PushFunction(const cRef & a_FnRef)
 {
 	ASSERT(IsValid());
 	ASSERT(m_NumCurrentFunctionArgs == -1);  // If not, there's already something pushed onto the stack
@@ -561,7 +561,7 @@ bool cLuaState::PushFunction(int a_FnRef)
 	// Push the error handler for lua_pcall()
 	lua_pushcfunction(m_LuaState, &ReportFnCallErrors);
 
-	lua_rawgeti(m_LuaState, LUA_REGISTRYINDEX, a_FnRef);  // same as lua_getref()
+	lua_rawgeti(m_LuaState, LUA_REGISTRYINDEX, static_cast<int>(a_FnRef));  // same as lua_getref()
 	if (!lua_isfunction(m_LuaState, -1))
 	{
 		lua_pop(m_LuaState, 2);
diff --git a/src/Bindings/LuaState.h b/src/Bindings/LuaState.h
index 88313f9fb..d3acb2797 100644
--- a/src/Bindings/LuaState.h
+++ b/src/Bindings/LuaState.h
@@ -640,18 +640,10 @@ protected:
 	*/
 	bool PushFunction(const char * a_FunctionName);
 
-	/** Pushes a function that has been saved into the global registry, identified by a_FnRef.
-	Returns true if successful. Logs a warning on failure
-	*/
-	bool PushFunction(int a_FnRef);
-
 	/** Pushes a function that has been saved as a reference.
 	Returns true if successful. Logs a warning on failure
 	*/
-	bool PushFunction(const cRef & a_FnRef)
-	{
-		return PushFunction(static_cast<int>(a_FnRef));
-	}
+	bool PushFunction(const cRef & a_FnRef);
 
 	/** Pushes a function that is stored in a referenced table by name
 	Returns true if successful. Logs a warning on failure
diff --git a/src/Bindings/PluginLua.cpp b/src/Bindings/PluginLua.cpp
index ee0d289a1..07d0a7526 100644
--- a/src/Bindings/PluginLua.cpp
+++ b/src/Bindings/PluginLua.cpp
@@ -1140,32 +1140,6 @@ int cPluginLua::CallFunctionFromForeignState(
 
 
 
-bool cPluginLua::CallbackWindowClosing(int a_FnRef, cWindow & a_Window, cPlayer & a_Player, bool a_CanRefuse)
-{
-	ASSERT(a_FnRef != LUA_REFNIL);
-
-	cOperation op(*this);
-	bool res = false;
-	op().Call(a_FnRef, &a_Window, &a_Player, a_CanRefuse, cLuaState::Return, res);
-	return res;
-}
-
-
-
-
-
-void cPluginLua::CallbackWindowSlotChanged(int a_FnRef, cWindow & a_Window, int a_SlotNum)
-{
-	ASSERT(a_FnRef != LUA_REFNIL);
-
-	cOperation op(*this);
-	op().Call(a_FnRef, &a_Window, a_SlotNum);
-}
-
-
-
-
-
 void cPluginLua::ClearWebTabs(void)
 {
 	auto webAdmin = cRoot::Get()->GetWebAdmin();
diff --git a/src/Bindings/PluginLua.h b/src/Bindings/PluginLua.h
index 9e6b53e75..e28e30698 100644
--- a/src/Bindings/PluginLua.h
+++ b/src/Bindings/PluginLua.h
@@ -141,12 +141,6 @@ public:
 	/** Returns true if the plugin contains the function for the specified hook type, using the old-style registration (#121) */
 	bool CanAddOldStyleHook(int a_HookType);
 
-	/** Calls the plugin-specified "cLuaWindow closing" callback. Returns true only if the callback returned true */
-	bool CallbackWindowClosing(int a_FnRef, cWindow & a_Window, cPlayer & a_Player, bool a_CanRefuse);
-
-	/** Calls the plugin-specified "cLuaWindow slot changed" callback. */
-	void CallbackWindowSlotChanged(int a_FnRef, cWindow & a_Window, int a_SlotNum);
-
 	/** Returns the name of Lua function that should handle the specified hook type in the older (#121) API */
 	static const char * GetHookFnName(int a_HookType);