diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index f8494bfa06..717489857c 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -1431,7 +1431,7 @@ float Temperature::analog_to_celsius_hotend(const int raw, const uint8_t e) {
     #if ENABLED(BED_USER_THERMISTOR)
       return user_thermistor_to_deg_c(CTI_BED, raw);
     #elif ENABLED(HEATER_BED_USES_THERMISTOR)
-      SCAN_THERMISTOR_TABLE(BEDTEMPTABLE, BEDTEMPTABLE_LEN);
+      SCAN_THERMISTOR_TABLE(BED_TEMPTABLE, BED_TEMPTABLE_LEN);
     #elif ENABLED(HEATER_BED_USES_AD595)
       return TEMP_AD595(raw);
     #elif ENABLED(HEATER_BED_USES_AD8495)
@@ -1449,7 +1449,7 @@ float Temperature::analog_to_celsius_hotend(const int raw, const uint8_t e) {
     #if ENABLED(CHAMBER_USER_THERMISTOR)
       return user_thermistor_to_deg_c(CTI_CHAMBER, raw);
     #elif ENABLED(HEATER_CHAMBER_USES_THERMISTOR)
-      SCAN_THERMISTOR_TABLE(CHAMBERTEMPTABLE, CHAMBERTEMPTABLE_LEN);
+      SCAN_THERMISTOR_TABLE(CHAMBER_TEMPTABLE, CHAMBER_TEMPTABLE_LEN);
     #elif ENABLED(HEATER_CHAMBER_USES_AD595)
       return TEMP_AD595(raw);
     #elif ENABLED(HEATER_CHAMBER_USES_AD8495)
diff --git a/Marlin/src/module/thermistor/thermistors.h b/Marlin/src/module/thermistor/thermistors.h
index 9d62f28bc2..00def3ae40 100644
--- a/Marlin/src/module/thermistor/thermistors.h
+++ b/Marlin/src/module/thermistor/thermistors.h
@@ -137,6 +137,9 @@
 #if ANY_THERMISTOR_IS(999) // User-defined table 2
   #include "thermistor_999.h"
 #endif
+#if ANY_THERMISTOR_IS(1000) // Custom
+  const short temptable_1000[][2] PROGMEM = { { 0, 0 } };
+#endif
 
 #define _TT_NAME(_N) temptable_ ## _N
 #define TT_NAME(_N) _TT_NAME(_N)
@@ -202,25 +205,29 @@
 #endif
 
 #ifdef THERMISTORBED
-  #define BEDTEMPTABLE TT_NAME(THERMISTORBED)
-  #define BEDTEMPTABLE_LEN COUNT(BEDTEMPTABLE)
+  #define BED_TEMPTABLE TT_NAME(THERMISTORBED)
+  #define BED_TEMPTABLE_LEN COUNT(BED_TEMPTABLE)
 #elif defined(HEATER_BED_USES_THERMISTOR)
   #error "No bed thermistor table specified"
 #else
-  #define BEDTEMPTABLE_LEN 0
+  #define BED_TEMPTABLE_LEN 0
 #endif
 
 #ifdef THERMISTORCHAMBER
-  #define CHAMBERTEMPTABLE TT_NAME(THERMISTORCHAMBER)
-  #define CHAMBERTEMPTABLE_LEN COUNT(CHAMBERTEMPTABLE)
+  #define CHAMBER_TEMPTABLE TT_NAME(THERMISTORCHAMBER)
+  #define CHAMBER_TEMPTABLE_LEN COUNT(CHAMBER_TEMPTABLE)
 #elif defined(HEATER_CHAMBER_USES_THERMISTOR)
   #error "No chamber thermistor table specified"
 #else
-  #define CHAMBERTEMPTABLE_LEN 0
+  #define CHAMBER_TEMPTABLE_LEN 0
 #endif
 
 // The SCAN_THERMISTOR_TABLE macro needs alteration?
-static_assert(HEATER_0_TEMPTABLE_LEN < 256 && HEATER_1_TEMPTABLE_LEN < 256 && HEATER_2_TEMPTABLE_LEN < 256 && HEATER_3_TEMPTABLE_LEN < 256 && HEATER_4_TEMPTABLE_LEN < 256 && BEDTEMPTABLE_LEN < 256 && CHAMBERTEMPTABLE_LEN < 256,
+static_assert(
+     HEATER_0_TEMPTABLE_LEN < 256 && HEATER_1_TEMPTABLE_LEN < 256
+  && HEATER_2_TEMPTABLE_LEN < 256 && HEATER_3_TEMPTABLE_LEN < 256
+  && HEATER_4_TEMPTABLE_LEN < 256 && HEATER_5_TEMPTABLE_LEN < 256
+  &&      BED_TEMPTABLE_LEN < 256 &&  CHAMBER_TEMPTABLE_LEN < 256,
   "Temperature conversion tables over 255 entries need special consideration."
 );