diff --git a/src/company_cmd.cpp b/src/company_cmd.cpp
--- a/src/company_cmd.cpp
+++ b/src/company_cmd.cpp
@@ -807,7 +807,7 @@ void CompanyAdminRemove(CompanyID compan
  * @param text unused
  * @return the cost of this operation or an error
  */
-CommandCost CmdCompanyCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
+CommandCost CmdCompanyCtrl(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 {
 	InvalidateWindowData(WC_COMPANY_LEAGUE, 0, 0);
 	CompanyID company_id = (CompanyID)GB(p1, 16, 8);
@@ -932,7 +932,7 @@ CommandCost CmdCompanyCtrl(TileIndex til
  * @param text unused
  * @return the cost of this operation or an error
  */
-CommandCost CmdSetCompanyManagerFace(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
+CommandCost CmdSetCompanyManagerFace(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 {
 	CompanyManagerFace cmf = (CompanyManagerFace)p2;
 
@@ -956,7 +956,7 @@ CommandCost CmdSetCompanyManagerFace(Til
  * @param text unused
  * @return the cost of this operation or an error
  */
-CommandCost CmdSetCompanyColour(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
+CommandCost CmdSetCompanyColour(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 {
 	Colours colour = Extract<Colours, 0, 8>(p2);
 	LiveryScheme scheme = Extract<LiveryScheme, 0, 8>(p1);
@@ -1067,9 +1067,9 @@ static bool IsUniqueCompanyName(const st
  * @param text the new name or an empty string when resetting to the default
  * @return the cost of this operation or an error
  */
-CommandCost CmdRenameCompany(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
+CommandCost CmdRenameCompany(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 {
-	bool reset = StrEmpty(text);
+	bool reset = text.empty();
 
 	if (!reset) {
 		if (Utf8StringLength(text) >= MAX_LENGTH_COMPANY_NAME_CHARS) return CMD_ERROR;
@@ -1113,9 +1113,9 @@ static bool IsUniquePresidentName(const 
  * @param text the new name or an empty string when resetting to the default
  * @return the cost of this operation or an error
  */
-CommandCost CmdRenamePresident(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
+CommandCost CmdRenamePresident(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 {
-	bool reset = StrEmpty(text);
+	bool reset = text.empty();
 
 	if (!reset) {
 		if (Utf8StringLength(text) >= MAX_LENGTH_PRESIDENT_NAME_CHARS) return CMD_ERROR;
@@ -1131,10 +1131,7 @@ CommandCost CmdRenamePresident(TileIndex
 			c->president_name = text;
 
 			if (c->name_1 == STR_SV_UNNAMED && c->name.empty()) {
-				char buf[80];
-
-				seprintf(buf, lastof(buf), "%s Transport", text);
-				DoCommand(0, 0, 0, DC_EXEC, CMD_RENAME_COMPANY, buf);
+				DoCommand(0, 0, 0, DC_EXEC, CMD_RENAME_COMPANY, text + " Transport");
 			}
 		}
 
@@ -1201,7 +1198,7 @@ uint32 CompanyInfrastructure::GetTramTot
  * @param text unused
  * @return the cost of this operation or an error
  */
-CommandCost CmdGiveMoney(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
+CommandCost CmdGiveMoney(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 {
 	if (!_settings_game.economy.give_money) return CMD_ERROR;