diff --git a/src/processor/checker.rs b/src/processor/checker.rs
index f8a7d45..e279f77 100644
--- a/src/processor/checker.rs
+++ b/src/processor/checker.rs
@@ -282,7 +282,7 @@ fn layer_candidates(mut candidates: Vec<AstPath>) -> Vec<Vec<AstPath>> {
         for (no, layer) in layers.iter().enumerate() {
             if !layer
                 .iter()
-                .any(|known_path| candidate.has_prefix(known_path))
+                .all(|known_path| candidate.has_prefix(known_path))
             {
                 appropriate_layer_no = Some(no);
                 break;