diff --git a/frontend/src/lib/components/apps/components/inputs/AppSelect.svelte b/frontend/src/lib/components/apps/components/inputs/AppSelect.svelte
index 548f382c55..73cbb05b3c 100644
--- a/frontend/src/lib/components/apps/components/inputs/AppSelect.svelte
+++ b/frontend/src/lib/components/apps/components/inputs/AppSelect.svelte
@@ -104,7 +104,7 @@
 		} else if (listItems.length > 0 && resolvedConfig?.preselectFirst) {
 			rawValue = resolvedConfig.items[0].value
 		}
-		if (rawValue !== undefined) {
+		if (rawValue !== undefined && rawValue !== null) {
 			value = JSON.stringify(rawValue)
 			outputs?.result.set(rawValue)
 		}