diff --git a/src/container_edits.rs b/src/container_edits.rs
index 6ab09db..bd420fd 100644
--- a/src/container_edits.rs
+++ b/src/container_edits.rs
@@ -278,7 +278,7 @@ impl Validate for DeviceNode {
         }
 
         if let Some(typ) = &self.node.r#type {
-            if valid_typs.contains(&typ.as_str()) {
+            if !valid_typs.contains(&typ.as_str()) {
                 return Err(anyhow!(
                     "device {:?}: invalid type {:?}",
                     self.node.path,