diff --git a/core/src/main/java/dev/morphia/mapping/codec/Conversions.java b/core/src/main/java/dev/morphia/mapping/codec/Conversions.java
index a63fc10a3f5..4aa781e666e 100644
--- a/core/src/main/java/dev/morphia/mapping/codec/Conversions.java
+++ b/core/src/main/java/dev/morphia/mapping/codec/Conversions.java
@@ -96,9 +96,7 @@ private static void registerStringConversions() {
                 throw new MappingException("Could not convert String to char: " + s);
             }
         });
-        register(Class.class, String.class, aClass -> {
-            return aClass.getName();
-        });
+        register(Class.class, String.class, Class::getName);
         register(String.class, Class.class, className -> {
             try {
                 return Thread.currentThread().getContextClassLoader().loadClass(className);