diff --git a/modules/flowable-engine-common/src/main/java/org/flowable/common/engine/impl/AbstractEngineConfiguration.java b/modules/flowable-engine-common/src/main/java/org/flowable/common/engine/impl/AbstractEngineConfiguration.java
index 18fe91b33a0..d856ba9b0b2 100755
--- a/modules/flowable-engine-common/src/main/java/org/flowable/common/engine/impl/AbstractEngineConfiguration.java
+++ b/modules/flowable-engine-common/src/main/java/org/flowable/common/engine/impl/AbstractEngineConfiguration.java
@@ -940,11 +940,15 @@ public void initMybatisTypeHandlers(Configuration configuration) {
         // Together with this check, all mappings were reviewed and the correct type was added.
         if (databaseType.equals(DATABASE_TYPE_MSSQL)) {
             handlerRegistry.register(Object.class, JdbcType.VARCHAR, new StringTypeHandler());
+            handlerRegistry.register(String.class, JdbcType.VARCHAR, new StringTypeHandler());
             handlerRegistry.register(Object.class, JdbcType.NVARCHAR, new NStringTypeHandler()); // Notice the 'N' prefix here
+            handlerRegistry.register(String.class, JdbcType.NVARCHAR, new NStringTypeHandler()); // Notice the 'N' prefix here
         } else {
             // However, for other databases, we want to keep the old behavior of always using 'varchar',
             // thus the same handler is used for both types.
+            handlerRegistry.register(String.class, JdbcType.VARCHAR, new StringTypeHandler());
             handlerRegistry.register(Object.class, JdbcType.VARCHAR, new StringTypeHandler());
+            handlerRegistry.register(String.class, JdbcType.NVARCHAR, new StringTypeHandler()); // Notice: no 'N' prefix here
             handlerRegistry.register(Object.class, JdbcType.NVARCHAR, new StringTypeHandler()); // Notice: no 'N' prefix here
         }