diff --git a/public/scripts/textgen-settings.js b/public/scripts/textgen-settings.js
index cf1afccb1..037bb1b5d 100644
--- a/public/scripts/textgen-settings.js
+++ b/public/scripts/textgen-settings.js
@@ -727,7 +727,7 @@ export function getTextGenGenerationData(finalPrompt, maxTokens, isImpersonate,
         'dynamic_temperature': settings.dynatemp,
         'dynatemp_low': settings.min_temp,
         'dynatemp_high': settings.max_temp,
-        'dynatemp_range': (settings.max_temp - settings.min_temp) / 2,
+        'dynatemp_range': settings.dynatemp ? (settings.max_temp - settings.min_temp) / 2 : 0,
         'stopping_strings': getStoppingStrings(isImpersonate, isContinue),
         'stop': getStoppingStrings(isImpersonate, isContinue),
         'truncation_length': max_context,