diff --git a/Spring-Batch-5.0-Migration-Guide.md b/Spring-Batch-5.0-Migration-Guide.md
index 89740ff..cba0bee 100644
--- a/Spring-Batch-5.0-Migration-Guide.md
+++ b/Spring-Batch-5.0-Migration-Guide.md
@@ -140,6 +140,7 @@ The following APIs were deprecated in previous versions and have been removed in
 Moreover, the following APIs have been removed/updated without deprecation:
 
 * The default constructor in `org.springframework.batch.core.configuration.annotation.DefaultBatchConfigurer` has been removed. Use the constructor that accepts a `DataSource` instead, see https://github.com/spring-projects/spring-batch/wiki/Spring-Batch-5.0-Migration-Guide#job-repositoryexplorer-configuration-updates.
+* The method `org.springframework.batch.core.step.builder.SimpleStepBuilder#processor(Function)` has been removed to allow lambdas to be passed as item processors. See https://github.com/spring-projects/spring-batch/issues/4061 for more details about the rationale behind this removal. If you use an actual `Function`  as argument for `SimpleStepBuilder::processor`, then you can change that to `.processor(function::apply)` to migrate to v5.
 * `org.springframework.batch.item.file.builder.FlatFileItemWriterBuilder#resource`, `org.springframework.batch.item.file.ResourceAwareItemWriterItemStream#setResource`, `org.springframework.batch.item.json.builder.JsonFileItemWriterBuilder#resource`, `org.springframework.batch.item.json.JsonFileItemWriter#JsonFileItemWriter`, `org.springframework.batch.item.support.AbstractFileItemWriter#setResource`, `org.springframework.batch.item.xml.builder.StaxEventItemWriterBuilder#resource` and `org.springframework.batch.item.xml.StaxEventItemWriter#setResource` have been updated to accept a `org.springframework.core.io.WritableResource` instead of a `org.springframework.core.io.Resource`. For more details about this change, please check https://github.com/spring-projects/spring-batch/issues/756
 
 # Pruning