diff --git a/public/app/plugins/datasource/prometheus/querybuilder/shared/LabelFilterItem.tsx b/public/app/plugins/datasource/prometheus/querybuilder/shared/LabelFilterItem.tsx
index dec8b2c6431..e2eccbf9045 100644
--- a/public/app/plugins/datasource/prometheus/querybuilder/shared/LabelFilterItem.tsx
+++ b/public/app/plugins/datasource/prometheus/querybuilder/shared/LabelFilterItem.tsx
@@ -120,4 +120,5 @@ const operators = [
   { label: '=~', value: '=~' },
   { label: '=', value: '=' },
   { label: '!=', value: '!=' },
+  { label: '!~', value: '!~' },
 ];
diff --git a/public/app/plugins/datasource/prometheus/querybuilder/shared/OperationParamEditor.tsx b/public/app/plugins/datasource/prometheus/querybuilder/shared/OperationParamEditor.tsx
index 55433edd8fc..4f07523e2d1 100644
--- a/public/app/plugins/datasource/prometheus/querybuilder/shared/OperationParamEditor.tsx
+++ b/public/app/plugins/datasource/prometheus/querybuilder/shared/OperationParamEditor.tsx
@@ -76,6 +76,7 @@ function SelectInputParamEditor({
       value={valueOption}
       options={selectOptions}
       placeholder={paramDef.placeholder}
+      allowCustomValue={true}
       onChange={(value) => onChange(index, value.value!)}
     />
   );