diff --git a/Marlin/src/lcd/thermistornames.h b/Marlin/src/lcd/thermistornames.h
index 3ac230f7870a..9cfb80fba3d8 100644
--- a/Marlin/src/lcd/thermistornames.h
+++ b/Marlin/src/lcd/thermistornames.h
@@ -85,9 +85,9 @@
 #elif THERMISTOR_ID == 18
   #define THERMISTOR_NAME "ATC Semitec 204GT-2"
 #elif THERMISTOR_ID == 20
-  #define THERMISTOR_NAME "Pt100 UltiMB"
+  #define THERMISTOR_NAME "Pt100 UltiMB 5v"
 #elif THERMISTOR_ID == 21
-  #define THERMISTOR_NAME "Pt100 UltiMB"
+  #define THERMISTOR_NAME "Pt100 UltiMB 3.3v"
 #elif THERMISTOR_ID == 201
   #define THERMISTOR_NAME "Pt100 OverLord"
 #elif THERMISTOR_ID == 60