diff --git a/src/subsidy_func.h b/src/subsidy_func.h
index a33c5d8bfa..89bf0f1fe2 100644
--- a/src/subsidy_func.h
+++ b/src/subsidy_func.h
@@ -21,6 +21,5 @@ std::pair<NewsReferenceType, NewsReferenceType> SetupSubsidyDecodeParam(const st
 void DeleteSubsidyWith(SourceType type, SourceID index);
 bool CheckSubsidised(CargoID cargo_type, CompanyID company, SourceType src_type, SourceID src, const Station *st);
 void RebuildSubsidisedSourceAndDestinationCache();
-void DeleteSubsidy(struct Subsidy *s);
 
 #endif /* SUBSIDY_FUNC_H */