diff --git a/firmware/controllers/lua/lua_hooks.cpp b/firmware/controllers/lua/lua_hooks.cpp
index b2f0e6384a..b5b06308d9 100644
--- a/firmware/controllers/lua/lua_hooks.cpp
+++ b/firmware/controllers/lua/lua_hooks.cpp
@@ -19,8 +19,6 @@ using namespace luaaa;
 // Some functions lean on existing FSIO implementation
 #include "fsio_impl.h"
 
-#define HUMAN_OFFSET 1
-
 #if EFI_UNIT_TEST
 Engine *engineForLuaUnitTests;
 #endif
@@ -55,17 +53,17 @@ static int getSensor(lua_State* l, SensorType type) {
 
 static int lua_getAuxAnalog(lua_State* l) {
 	// todo: shall we use HUMAN_INDEX since UI goes from 1 and Lua loves going from 1?
-	auto sensorIndex = luaL_checkinteger(l, 1);
+	auto zeroBasedSensorIndex = luaL_checkinteger(l, 1);
 
-	auto type = static_cast<SensorType>(sensorIndex + static_cast<int>(SensorType::Aux1));
+	auto type = static_cast<SensorType>(zeroBasedSensorIndex + static_cast<int>(SensorType::Aux1));
 
 	return getSensor(l, type);
 }
 
 static int lua_getSensorByIndex(lua_State* l) {
-	auto sensorIndex = luaL_checkinteger(l, 1);
+	auto zeroBasedSensorIndex = luaL_checkinteger(l, 1);
 
-	return getSensor(l, static_cast<SensorType>(sensorIndex));
+	return getSensor(l, static_cast<SensorType>(zeroBasedSensorIndex));
 }
 
 static int lua_getSensorByName(lua_State* l) {
@@ -76,26 +74,26 @@ static int lua_getSensorByName(lua_State* l) {
 }
 
 static int lua_getSensorRaw(lua_State* l) {
-	auto sensorIndex = luaL_checkinteger(l, 1);
+	auto zeroBasedSensorIndex = luaL_checkinteger(l, 1);
 
-	lua_pushnumber(l, Sensor::getRaw(static_cast<SensorType>(sensorIndex)));
+	lua_pushnumber(l, Sensor::getRaw(static_cast<SensorType>(zeroBasedSensorIndex)));
 	return 1;
 }
 
 static int lua_hasSensor(lua_State* l) {
-	auto sensorIndex = luaL_checkinteger(l, 1);
+	auto zeroBasedSensorIndex = luaL_checkinteger(l, 1);
 
-	lua_pushboolean(l, Sensor::hasSensor(static_cast<SensorType>(sensorIndex)));
+	lua_pushboolean(l, Sensor::hasSensor(static_cast<SensorType>(zeroBasedSensorIndex)));
 	return 1;
 }
 
 static int lua_table3d(lua_State* l) {
-	auto tableIdx = luaL_checkinteger(l, 1);
+	auto humanTableIdx = luaL_checkinteger(l, 1);
 	auto x = luaL_checknumber(l, 2);
 	auto y = luaL_checknumber(l, 3);
 
 	// index table, compute table lookup
-	auto result = getscriptTable(tableIdx)->getValue(x, y);
+	auto result = getscriptTable(humanTableIdx - HUMAN_OFFSET)->getValue(x, y);
 
 	lua_pushnumber(l, result);
 	return 1;
@@ -103,7 +101,7 @@ static int lua_table3d(lua_State* l) {
 
 static int lua_curve2d(lua_State* l) {
 	// index starting from 1
-	auto curveIdx = luaL_checkinteger(l, 1);
+	auto humanCurveIdx = luaL_checkinteger(l, 1);
 	auto x = luaL_checknumber(l, 2);
 
 #if EFI_UNIT_TEST
@@ -111,7 +109,7 @@ static int lua_curve2d(lua_State* l) {
 	EXPAND_Engine;
 #endif
 
-	auto result = getCurveValue(curveIdx - HUMAN_OFFSET, x PASS_ENGINE_PARAMETER_SUFFIX);
+	auto result = getCurveValue(humanCurveIdx - HUMAN_OFFSET, x PASS_ENGINE_PARAMETER_SUFFIX);
 
 	lua_pushnumber(l, result);
 	return 1;
diff --git a/firmware/util/efilib.h b/firmware/util/efilib.h
index 6e6c378111..3141df2c7c 100644
--- a/firmware/util/efilib.h
+++ b/firmware/util/efilib.h
@@ -29,8 +29,10 @@ static inline uint32_t SWAP_UINT32(uint32_t x)
 // we also have efi::size which probably does not work for C code
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
-// human-readable IDs start from 1 while computer-readbale indexes start from 0
-#define ID2INDEX(id) ((id) - 1)
+#define HUMAN_OFFSET 1
+
+// human-readable IDs start from 1 while computer-readable indices start from 0
+#define ID2INDEX(id) ((id) - HUMAN_OFFSET)
 
 // number of milliseconds in one period of given frequency (per second)
 #define frequency2periodMs(freq) ((1000.0f) / (freq))