diff --git a/lib/util/trie.js b/lib/util/trie.js
index 262ed35..3c70968 100644
--- a/lib/util/trie.js
+++ b/lib/util/trie.js
@@ -182,12 +182,12 @@ const __suggest = (trie, path, remaining, maxSuggestions) => {
     return results;
   }
 
-  const [pos, prefix] = binarySearch(trie.children, remaining);
-  if (prefix.length === 0) {
-    return []; // nothing in common
-  }
+  const [pos] = binarySearch(trie.children, remaining);
   if (pos < trie.children.length) {
     const [haveKey, haveChildNode] = trie.children[pos];
+    if (!remaining.startsWith(haveKey) && !haveKey.startsWith(remaining)) {
+      return [];
+    }
     return __suggest(haveChildNode, path+haveKey, remaining.slice(haveKey.length), maxSuggestions);
   }
 
diff --git a/tests/trie.js b/tests/trie.js
index 72c6a8f..215c371 100644
--- a/tests/trie.js
+++ b/tests/trie.js
@@ -99,4 +99,9 @@ assert.equal(
 assert.deepEqual(
   suggest(bigTrie)("ooo")(2),
   []
+);
+
+assert.deepEqual(
+  suggest(bigTrie)("df")(2),
+  []
 );
\ No newline at end of file