diff --git a/src/saveload/company_sl.cpp b/src/saveload/company_sl.cpp
--- a/src/saveload/company_sl.cpp
+++ b/src/saveload/company_sl.cpp
@@ -259,7 +259,7 @@ static const SaveLoad _company_desc[] = 
 
 	    SLE_VAR(CompanyProperties, colour,                SLE_UINT8),
 	    SLE_VAR(CompanyProperties, money_fraction,        SLE_UINT8),
-	SLE_CONDVAR(CompanyProperties, avail_railtypes,       SLE_VAR_I32 | SLE_FILE_I8,   0, 57),
+	SLE_CONDNULL(1,  0,  57), ///< avail_railtypes
 	    SLE_VAR(CompanyProperties, block_preview,         SLE_UINT8),
 
 	SLE_CONDNULL(2,  0,  93), ///< cargo_types