diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index 16b077dae..b26b1c96c 100644
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -181,9 +181,9 @@ enum class testScreen
 static int  lcd_selftest_screen(testScreen screen, int _progress, int _progress_scale, bool _clear, int _delay);
 static void lcd_selftest_screen_step(int _row, int _col, int _state, const char *_name, const char *_indicator);
 static bool lcd_selftest_manual_fan_check(int _fan, bool check_opposite);
-#ifdef FAN_CHECK
+#ifdef FANCHECK
 static bool lcd_selftest_fan_dialog(int _fan);
-#endif //FAN_CHECk
+#endif //FANCHECK
 static bool lcd_selftest_fsensor();
 static bool selftest_irsensor();
 static void lcd_selftest_error(int _error_no, const char *_error_1, const char *_error_2);