diff --git a/frontend/src/lib/components/IdEditorInput.svelte b/frontend/src/lib/components/IdEditorInput.svelte
index 1db5bf686f574..dae667c867c1b 100644
--- a/frontend/src/lib/components/IdEditorInput.svelte
+++ b/frontend/src/lib/components/IdEditorInput.svelte
@@ -11,10 +11,11 @@
 	export let value = initialId
 	export let buttonText = ''
 	export let btnClasses = '!p-1 !w-[34px] !ml-1'
+	export let acceptUnderScores = false
 
 	let error = ''
 	const dispatch = createEventDispatcher()
-	const regex = /^[a-zA-Z][a-zA-Z0-9]*$/
+	const regex = acceptUnderScores ? /^[a-zA-Z][a-zA-Z0-9_]*$/ : /^[a-zA-Z][a-zA-Z0-9]*$/
 
 	$: validateId(value, reservedIds)
 
diff --git a/frontend/src/lib/components/flows/map/FlowModuleSchemaItem.svelte b/frontend/src/lib/components/flows/map/FlowModuleSchemaItem.svelte
index c5e3f62c65568..f369ec2624647 100644
--- a/frontend/src/lib/components/flows/map/FlowModuleSchemaItem.svelte
+++ b/frontend/src/lib/components/flows/map/FlowModuleSchemaItem.svelte
@@ -77,6 +77,7 @@
 					btnClasses="!ml-1"
 					label=""
 					initialId={id}
+					acceptUnderScores
 					reservedIds={dfs(flowStore?.value.modules ?? [], (x) => x.id)}
 					bind:value={newId}
 					on:save={(e) => {