3 files changed, 2 insertions, 5 deletions
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 26009d749..a73337ae6 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -31,6 +31,7 @@
 #include "../string_func.h"
 #include "../player_func.h"
 #include "../settings_type.h"
+#include "../rev.h"
 #ifdef DEBUG_DUMP_COMMANDS
 	#include "../core/alloc_func.hpp"
 #endif /* DEBUG_DUMP_COMMANDS */
@@ -1470,7 +1471,6 @@ void NetworkShutDown()
  */
 bool IsNetworkCompatibleVersion(const char *other)
 {
-	extern const char _openttd_revision[];
 	return strncmp(_openttd_revision, other, NETWORK_REVISION_LENGTH - 1) == 0;
 }
 
diff --git a/src/network/network.h b/src/network/network.h
index 3cedb9b6e..fbe2a31cc 100644
--- a/src/network/network.h
+++ b/src/network/network.h
@@ -31,9 +31,6 @@ static inline void NetworkShutDown() {}
 
 #endif /* ENABLE_NETWORK */
 
-/** What is the revision of OpenTTD. */
-extern const char _openttd_revision[];
-
 /** As which player do we play? */
 extern PlayerID _network_playas;
 
diff --git a/src/network/network_client.cpp b/src/network/network_client.cpp
index abc5c6203..eb129ffe1 100644
--- a/src/network/network_client.cpp
+++ b/src/network/network_client.cpp
@@ -24,6 +24,7 @@
 #include "../player_func.h"
 #include "../player_base.h"
 #include "../player_gui.h"
+#include "../rev.h"
 
 #include "table/strings.h"
 
@@ -122,7 +123,6 @@ DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_JOIN)
 	//    String: Unique id to find the player back in server-listing
 	//
 
-	extern const char _openttd_revision[];
 	Packet *p;
 	_network_join_status = NETWORK_JOIN_STATUS_AUTHORIZING;
 	InvalidateWindow(WC_NETWORK_STATUS_WINDOW, 0);