diff --git a/fw/Core/Src/main.c b/fw/Core/Src/main.c
index 711fd4f..6f8ed44 100644
--- a/fw/Core/Src/main.c
+++ b/fw/Core/Src/main.c
@@ -90,7 +90,7 @@ union {
 	struct {
 		uint16_t main_values[3];			// CO2, T_SHT4x, RH_SHT4x
 		uint16_t backup_values[2];			// T_SCD4x, RH_SCD4x
-		int16_t  extented_range_values[2];	// T_SHT4x_signed, T_SCD4x_signed
+		int16_t  extended_range_values[2];	// T_SHT4x_signed, T_SCD4x_signed
 	};
 	struct {
 		uint16_t unsigned_values[5];