diff --git a/src/main/java/org/springframework/data/jpa/repository/support/SimpleJpaRepository.java b/src/main/java/org/springframework/data/jpa/repository/support/SimpleJpaRepository.java
index ccea9c4f1..7b8bf363a 100644
--- a/src/main/java/org/springframework/data/jpa/repository/support/SimpleJpaRepository.java
+++ b/src/main/java/org/springframework/data/jpa/repository/support/SimpleJpaRepository.java
@@ -57,6 +57,7 @@ import org.springframework.data.jpa.repository.query.JpaEntityGraph;
 import org.springframework.data.jpa.repository.query.QueryUtils;
 import org.springframework.data.repository.support.PageableExecutionUtils;
 import org.springframework.data.repository.support.PageableExecutionUtils.TotalSupplier;
+import org.springframework.data.util.ProxyUtils;
 import org.springframework.stereotype.Repository;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.Assert;
@@ -178,7 +179,9 @@ public class SimpleJpaRepository<T, ID extends Serializable>
 			return;
 		}
 
-		T existing = (T) em.find(entity.getClass(), entityInformation.getId(entity));
+		Class<?> type = ProxyUtils.getUserClass(entity);
+
+		T existing = (T) em.find(type, entityInformation.getId(entity));
 
 		// if the entity to be deleted doesn't exist, delete is a NOOP
 		if (existing == null) {