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-rw-r--r--src/command_func.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/command_func.h b/src/command_func.h
index ccb9c2155..888468429 100644
--- a/src/command_func.h
+++ b/src/command_func.h
@@ -77,6 +77,7 @@ void NetworkSend_Command(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, Comma
*/
extern const char *_cmd_text;
extern Money _additional_cash_required;
+extern StringID _error_message;
/**
* Checks if a integer value belongs to a command.