diff --git a/byte-buddy-dep/src/main/java/net/bytebuddy/build/Plugin.java b/byte-buddy-dep/src/main/java/net/bytebuddy/build/Plugin.java
index 67f0fe78eb..b77be37bca 100644
--- a/byte-buddy-dep/src/main/java/net/bytebuddy/build/Plugin.java
+++ b/byte-buddy-dep/src/main/java/net/bytebuddy/build/Plugin.java
@@ -3398,7 +3398,7 @@ protected enum NoFolderMatcher implements ElementMatcher<Element> {
                      * {@inheritDoc}
                      */
                     public boolean matches(@MaybeNull Element target) {
-                        return target == null || target.getName().endsWith("/");
+                        return target == null || !target.getName().endsWith("/");
                     }
                 }
             }
diff --git a/byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineSourceFilteringTest.java b/byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineSourceFilteringTest.java
index c6aa6b2f59..ba75a960c8 100644
--- a/byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineSourceFilteringTest.java
+++ b/byte-buddy-dep/src/test/java/net/bytebuddy/build/PluginEngineSourceFilteringTest.java
@@ -95,7 +95,7 @@ public void testMultiReleaseFilter() throws Exception {
         when(second.getName()).thenReturn(ClassFileLocator.META_INF_VERSIONS + "17/foo/Bar.class");
         when(third.getName()).thenReturn(ClassFileLocator.META_INF_VERSIONS + "11/foo/Bar.class");
 
-        Plugin.Engine.Source.Origin origin = Plugin.Engine.Source.Filtering.dropMultiReleaseClassFilesAbove(this.source, ClassFileVersion.JAVA_V11).read();
+        Plugin.Engine.Source.Origin origin = Plugin.Engine.Source.Filtering.dropMultiReleaseClassFilesAbove(source, ClassFileVersion.JAVA_V11).read();
         Iterator<Plugin.Engine.Source.Element> iterator = origin.iterator();
         assertThat(iterator.hasNext(), is(true));
         assertThat(iterator.next(), is(first));
@@ -103,4 +103,22 @@ public void testMultiReleaseFilter() throws Exception {
         assertThat(iterator.next(), is(third));
         assertThat(iterator.hasNext(), is(false));
     }
+
+    @Test
+    public void testFolderFilter() throws Exception {
+        when(source.read()).thenReturn(origin);
+        when(origin.iterator()).thenReturn(Arrays.asList(first, second, third).iterator());
+
+        when(first.getName()).thenReturn("foo/");
+        when(second.getName()).thenReturn("foo/Bar.class");
+        when(third.getName()).thenReturn("foo/Qux.class");
+
+        Plugin.Engine.Source.Origin origin = Plugin.Engine.Source.Filtering.dropFolders(source).read();
+        Iterator<Plugin.Engine.Source.Element> iterator = origin.iterator();
+        assertThat(iterator.hasNext(), is(true));
+        assertThat(iterator.next(), is(second));
+        assertThat(iterator.hasNext(), is(true));
+        assertThat(iterator.next(), is(third));
+        assertThat(iterator.hasNext(), is(false));
+    }
 }