diff --git a/src/company_cmd.cpp b/src/company_cmd.cpp
index 671c6406e6..25f5959b10 100644
--- a/src/company_cmd.cpp
+++ b/src/company_cmd.cpp
@@ -317,28 +317,24 @@ CommandCost CheckTileOwnership(TileIndex tile)
  */
 static void GenerateCompanyName(Company *c)
 {
-	TileIndex tile;
-	Town *t;
-	StringID str;
-	Company *cc;
-	uint32 strp;
 	/* Reserve space for extra unicode character. We need to do this to be able
 	 * to detect too long company name. */
 	char buffer[MAX_LENGTH_COMPANY_NAME_BYTES + MAX_CHAR_LENGTH];
 
 	if (c->name_1 != STR_SV_UNNAMED) return;
+	if (c->last_build_coordinate == 0) return;
 
-	tile = c->last_build_coordinate;
-	if (tile == 0) return;
-
-	t = ClosestTownFromTile(tile, UINT_MAX);
+	Town *t = ClosestTownFromTile(c->last_build_coordinate, UINT_MAX);
 
+	StringID str;
+	uint32 strp;
 	if (t->name == NULL && IsInsideMM(t->townnametype, SPECSTR_TOWNNAME_START, SPECSTR_TOWNNAME_LAST + 1)) {
 		str = t->townnametype - SPECSTR_TOWNNAME_START + SPECSTR_PLAYERNAME_START;
 		strp = t->townnameparts;
 
 verify_name:;
 		/* No companies must have this name already */
+		Company *cc;
 		FOR_ALL_COMPANIES(cc) {
 			if (cc->name_1 == str && cc->name_2 == strp) goto bad_town_name;
 		}
diff --git a/src/economy.cpp b/src/economy.cpp
index ce0a717b88..2ea9a386ac 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -126,7 +126,6 @@ static PriceMultipliers _price_base_multiplier;
 Money CalculateCompanyValue(const Company *c, bool including_loan)
 {
 	Owner owner = c->index;
-	Money value = 0;
 
 	Station *st;
 	uint num = 0;
@@ -135,7 +134,7 @@ Money CalculateCompanyValue(const Company *c, bool including_loan)
 		if (st->owner == owner) num += CountBits((byte)st->facilities);
 	}
 
-	value += num * _price[PR_STATION_VALUE] * 25;
+	Money value = num * _price[PR_STATION_VALUE] * 25;
 
 	Vehicle *v;
 	FOR_ALL_VEHICLES(v) {
@@ -556,7 +555,6 @@ static void CompanyCheckBankrupt(Company *c)
 static void CompaniesGenStatistics()
 {
 	Station *st;
-	Company *c;
 
 	Backup<CompanyByte> cur_company(_current_company, FILE_LINE);
 	FOR_ALL_STATIONS(st) {
@@ -568,6 +566,7 @@ static void CompaniesGenStatistics()
 
 	if (!HasBit(1 << 0 | 1 << 3 | 1 << 6 | 1 << 9, _cur_month)) return;
 
+	Company *c;
 	FOR_ALL_COMPANIES(c) {
 		memmove(&c->old_economy[1], &c->old_economy[0], sizeof(c->old_economy) - sizeof(c->old_economy[0]));
 		c->old_economy[0] = c->cur_economy;
@@ -1441,9 +1440,6 @@ void CompaniesMonthlyLoop()
 
 static void DoAcquireCompany(Company *c)
 {
-	Company *owner;
-	int i;
-	Money value;
 	CompanyID ci = c->index;
 
 	CompanyNewsInformation *cni = MallocT<CompanyNewsInformation>(1);
@@ -1460,13 +1456,13 @@ static void DoAcquireCompany(Company *c)
 	ChangeOwnershipOfCompanyItems(ci, _current_company);
 
 	if (c->bankrupt_value == 0) {
-		owner = Company::Get(_current_company);
+		Company *owner = Company::Get(_current_company);
 		owner->current_loan += c->current_loan;
 	}
 
-	value = CalculateCompanyValue(c) >> 2;
+	Money value = CalculateCompanyValue(c) >> 2;
 	Backup<CompanyByte> cur_company(_current_company, FILE_LINE);
-	for (i = 0; i != 4; i++) {
+	for (int i = 0; i != 4; i++) {
 		if (c->share_owners[i] != COMPANY_SPECTATOR) {
 			cur_company.Change(c->share_owners[i]);
 			SubtractMoneyFromCompany(CommandCost(EXPENSES_OTHER, -value));
@@ -1518,12 +1514,11 @@ CommandCost CmdBuyShareInCompany(TileIndex tile, DoCommandFlag flags, uint32 p1,
 	cost.AddCost(CalculateCompanyValue(c) >> 2);
 	if (flags & DC_EXEC) {
 		OwnerByte *b = c->share_owners;
-		int i;
 
 		while (*b != COMPANY_SPECTATOR) b++; // share owners is guaranteed to contain at least one COMPANY_SPECTATOR
 		*b = _current_company;
 
-		for (i = 0; c->share_owners[i] == _current_company;) {
+		for (int i = 0; c->share_owners[i] == _current_company;) {
 			if (++i == 4) {
 				c->bankrupt_value = 0;
 				DoAcquireCompany(c);
diff --git a/src/engine.cpp b/src/engine.cpp
index e3f8010616..91d53e786f 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -524,7 +524,6 @@ void SetYearEngineAgingStops()
 void StartupOneEngine(Engine *e, Date aging_date)
 {
 	const EngineInfo *ei = &e->info;
-	uint32 r;
 
 	e->age = 0;
 	e->flags = 0;
@@ -533,7 +532,7 @@ void StartupOneEngine(Engine *e, Date aging_date)
 	/* Don't randomise the start-date in the first two years after gamestart to ensure availability
 	 * of engines in early starting games.
 	 * Note: TTDP uses fixed 1922 */
-	r = Random();
+	uint32 r = Random();
 	e->intro_date = ei->base_intro <= ConvertYMDToDate(_settings_game.game_creation.starting_year + 2, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;
 	if (e->intro_date <= _date) {
 		e->age = (aging_date - e->intro_date) >> 5;
@@ -601,14 +600,14 @@ static void AcceptEnginePreview(EngineID eid, CompanyID company)
 
 static CompanyID GetBestCompany(uint8 pp)
 {
-	const Company *c;
-	int32 best_hist;
 	CompanyID best_company;
 	CompanyMask mask = 0;
 
 	do {
-		best_hist = -1;
+		int32 best_hist = -1;
 		best_company = INVALID_COMPANY;
+
+		const Company *c;
 		FOR_ALL_COMPANIES(c) {
 			if (c->block_preview == 0 && !HasBit(mask, c->index) &&
 					c->old_economy[0].performance_history > best_hist) {