diff --git a/Marlin/thermistortables.h b/Marlin/thermistortables.h
index 462337778d..a65d3eb501 100644
--- a/Marlin/thermistortables.h
+++ b/Marlin/thermistortables.h
@@ -204,8 +204,8 @@
 #endif
 
 // The SCAN_THERMISTOR_TABLE macro needs alteration?
-static_assert(HEATER_0_TEMPTABLE_LEN < 128 && HEATER_1_TEMPTABLE_LEN < 128 && HEATER_2_TEMPTABLE_LEN < 128 && HEATER_3_TEMPTABLE_LEN < 128 && HEATER_4_TEMPTABLE_LEN < 128 && BEDTEMPTABLE_LEN < 128 && CHAMBERTEMPTABLE_LEN < 128,
-  "Temperature conversion tables over 127 entries need special consideration."
+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,
+  "Temperature conversion tables over 255 entries need special consideration."
 );
 
 // Set the high and low raw values for the heaters