diff --git a/src/lua-engine.cpp b/src/lua-engine.cpp
index c9711d85..a230fcba 100644
--- a/src/lua-engine.cpp
+++ b/src/lua-engine.cpp
@@ -5825,8 +5825,8 @@ static int bit_tobit(lua_State *L) { BRET(barg(L, 1)) }
 static int bit_bnot(lua_State *L) { BRET(~barg(L, 1)) }
 
 #define BIT_OP(func, opr) \
-  static int func(lua_State *L) { int i; UBits b = barg(L, 1); \
-	for (i = lua_gettop(L); i > 1; i--) b opr barg(L, i); BRET(b) }
+  static int func(lua_State *L) { UBits b = barg(L, 1); \
+	for (int i = lua_gettop(L); i > 1; i--){ b opr barg(L, i); } BRET(b) }
 BIT_OP(bit_band, &=)
 BIT_OP(bit_bor, |=)
 BIT_OP(bit_bxor, ^=)