diff --git a/Marlin/src/inc/Conditionals_post.h b/Marlin/src/inc/Conditionals_post.h
index efed5ae8e284..508585d2ffcf 100644
--- a/Marlin/src/inc/Conditionals_post.h
+++ b/Marlin/src/inc/Conditionals_post.h
@@ -2809,7 +2809,7 @@
   #define HAS_FAN7 1
 #endif
 #undef _NOT_E_AUTO
-#undef _HAS_FANS
+#undef _HAS_FAN
 #if PIN_EXISTS(CONTROLLER_FAN)
   #define HAS_CONTROLLER_FAN 1
 #endif
diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index 1408574ec674..d5e3df2fb177 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -2693,7 +2693,7 @@ void Temperature::disable_all_heaters() {
       #endif
 
       #if HAS_MAX31855_LIBRARY
-        Adafruit_MAX31855 &max855ref = THERMO_SEL(max31855_0, max31855_1);
+        MAX31855 &max855ref = THERMO_SEL(max31855_0, max31855_1);
         max_tc_temp = max855ref.readRaw32();
       #endif