diff --git a/system/lm75/lm75.c b/system/lm75/lm75.c
index 3414785f2..57595fcbe 100644
--- a/system/lm75/lm75.c
+++ b/system/lm75/lm75.c
@@ -46,7 +46,7 @@
 
 #if !defined(CONFIG_SYSTEM_LM75_FAHRENHEIT) && !defined(CONFIG_SYSTEM_LM75_CELSIUS)
 #  warning one of CONFIG_SYSTEM_LM75_FAHRENHEIT or CONFIG_SYSTEM_LM75_CELSIUS must be defined
-#  defeind CONFIG_SYSTEM_LM75_FAHRENHEIT 1
+#  define CONFIG_SYSTEM_LM75_FAHRENHEIT 1
 #endif
 
 #if defined(CONFIG_SYSTEM_LM75_FAHRENHEIT) && defined(CONFIG_SYSTEM_LM75_CELSIUS)