diff --git a/client/src/app/gauges/controls/html-select/html-select.component.ts b/client/src/app/gauges/controls/html-select/html-select.component.ts
index 2a5567237..1b3170ee2 100644
--- a/client/src/app/gauges/controls/html-select/html-select.component.ts
+++ b/client/src/app/gauges/controls/html-select/html-select.component.ts
@@ -69,6 +69,9 @@ export class HtmlSelectComponent extends GaugeBaseComponent {
                 if (Number.isNaN(val)) {
                     // maybe boolean
                     val = Number(sig.value);
+                    if (Number.isNaN(val)) {
+                        val = sig.value;
+                    }
                 } else {
                     val = parseFloat(val.toFixed(5));
                 }