diff --git a/AK/Utf16View.h b/AK/Utf16View.h
index 5a5c2d8852b..0fd01edb43d 100644
--- a/AK/Utf16View.h
+++ b/AK/Utf16View.h
@@ -420,7 +420,7 @@ public:
 
         if (has_ascii_storage()) {
             if (!AK::is_ascii(needle))
-                return false;
+                return {};
 
             auto byte = static_cast<char>(needle);
             return AK::memmem_optional(m_string.ascii + start_offset, length_in_code_units() - start_offset, &byte, sizeof(byte));
diff --git a/Tests/AK/TestUtf16View.cpp b/Tests/AK/TestUtf16View.cpp
index 0721192b0eb..f234766ae59 100644
--- a/Tests/AK/TestUtf16View.cpp
+++ b/Tests/AK/TestUtf16View.cpp
@@ -547,6 +547,12 @@ TEST_CASE(contains)
     EXPECT(u"😀"sv.contains(u'\xd83d'));
     EXPECT(u"😀"sv.contains(u'\xde00'));
 
+    EXPECT(!Utf16View { ""sv }.contains(u'a'));
+    EXPECT(Utf16View { "a"sv }.contains(u'a'));
+    EXPECT(!Utf16View { "b"sv }.contains(u'a'));
+    EXPECT(!Utf16View { "b"sv }.contains(u'\xd83d'));
+    EXPECT(!Utf16View { "b"sv }.contains(u'\xde00'));
+
     EXPECT(u""sv.contains(u""sv));
     EXPECT(!u""sv.contains(u"a"sv));
     EXPECT(u"a"sv.contains(u"a"sv));