diff --git a/network/network_cmd_ingame.cc b/network/network_cmd_ingame.cc
index ebd6eb92054..64609bf210d 100644
--- a/network/network_cmd_ingame.cc
+++ b/network/network_cmd_ingame.cc
@@ -946,7 +946,7 @@ nwc_tool_t::nwc_tool_t(spieler_t *sp, werkzeug_t *wkz, koord3d pos_, uint32 sync
 	// write custom data of wkz to our internal buffer
 	custom_data = new memory_rw_t(custom_data_buf, lengthof(custom_data_buf), true);
 	if (sp) {
-		wkz->rdwr_custom_data(sp->get_player_nr(), custom_data);
+		wkz->rdwr_custom_data(custom_data);
 	}
 }
 
@@ -1225,7 +1225,7 @@ void nwc_tool_t::do_command(karte_t *welt)
 
 		if(  wkz  ) {
 			// read custom data
-			wkz->rdwr_custom_data(player_nr, custom_data);
+			wkz->rdwr_custom_data(custom_data);
 			// set flags correctly
 			if (local) {
 				wkz->flags = flags | werkzeug_t::WFL_LOCAL;
diff --git a/simmenu.cc b/simmenu.cc
index 7b9257cd707..cfdc2238e47 100644
--- a/simmenu.cc
+++ b/simmenu.cc
@@ -847,7 +847,7 @@ bool two_click_werkzeug_t::init(spieler_t *)
 }
 
 
-void two_click_werkzeug_t::rdwr_custom_data(uint8, memory_rw_t *packet)
+void two_click_werkzeug_t::rdwr_custom_data(memory_rw_t *packet)
 {
 	packet->rdwr_bool(first_click_var);
 	sint16 posx = start.x; packet->rdwr_short(posx); start.x = posx;
diff --git a/simmenu.h b/simmenu.h
index 5ae0064e540..83552551768 100644
--- a/simmenu.h
+++ b/simmenu.h
@@ -244,7 +244,7 @@ class werkzeug_t {
 	void set_default_param(const char* str) { default_param = str; }
 
 	// transfer additional information in networkgames
-	virtual void rdwr_custom_data(uint8 /* player_nr */, memory_rw_t*) { }
+	virtual void rdwr_custom_data(memory_rw_t*) { }
 
 	// this will draw the tool with some indication, if active
 	virtual bool is_selected() const;
@@ -331,7 +331,7 @@ class two_click_werkzeug_t : public werkzeug_t {
 		MEMZERO(start_marker);
 	}
 
-	void rdwr_custom_data(uint8 player_nr, memory_rw_t*) OVERRIDE;
+	void rdwr_custom_data(memory_rw_t*) OVERRIDE;
 	bool init(spieler_t*) OVERRIDE;
 	bool exit(spieler_t* const sp) OVERRIDE { return init(sp); }
 
diff --git a/simwerkz.cc b/simwerkz.cc
index ceda4c253ab..47c7580d892 100644
--- a/simwerkz.cc
+++ b/simwerkz.cc
@@ -2356,9 +2356,9 @@ const char *wkz_brueckenbau_t::do_work( spieler_t *sp, const koord3d &start, con
 	}
 }
 
-void wkz_brueckenbau_t::rdwr_custom_data(uint8 player_nr, memory_rw_t *packet)
+void wkz_brueckenbau_t::rdwr_custom_data(memory_rw_t *packet)
 {
-	two_click_werkzeug_t::rdwr_custom_data(player_nr, packet);
+	two_click_werkzeug_t::rdwr_custom_data(packet);
 	uint8 i = ribi;
 	packet->rdwr_byte(i);
 	ribi = (ribi_t::ribi)i;
diff --git a/simwerkz.h b/simwerkz.h
index 567f3c2335e..416178e6414 100644
--- a/simwerkz.h
+++ b/simwerkz.h
@@ -298,7 +298,7 @@ class wkz_brueckenbau_t : public two_click_werkzeug_t {
 	bool is_init_network_save() const OVERRIDE { return true; }
 	waytype_t get_waytype() const OVERRIDE;
 	bool remove_preview_necessary() const OVERRIDE { return !is_first_click(); }
-	void rdwr_custom_data(uint8 player_nr, memory_rw_t*) OVERRIDE;
+	void rdwr_custom_data(memory_rw_t*) OVERRIDE;
 };
 
 class wkz_tunnelbau_t : public two_click_werkzeug_t {