diff --git a/jOOQ/src/main/java/org/jooq/tools/jdbc/MockResultSetMetaData.java b/jOOQ/src/main/java/org/jooq/tools/jdbc/MockResultSetMetaData.java
index 2c0a4dc87c..b25389120d 100644
--- a/jOOQ/src/main/java/org/jooq/tools/jdbc/MockResultSetMetaData.java
+++ b/jOOQ/src/main/java/org/jooq/tools/jdbc/MockResultSetMetaData.java
@@ -265,6 +265,6 @@ public class MockResultSetMetaData implements ResultSetMetaData, Serializable {
     public String getColumnClassName(int column) throws SQLException {
         rs.checkNotClosed();
 
-        return rs.result.field(column - 1).getType().getName();
+        return rs.result.field(column - 1).getDataType().getFromType().getName();
     }
 }
\ No newline at end of file