diff --git a/jOOQ/src/main/java/org/jooq/impl/DefaultRecordMapper.java b/jOOQ/src/main/java/org/jooq/impl/DefaultRecordMapper.java
index 16dae0c1a6..5e1daa3d1b 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DefaultRecordMapper.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DefaultRecordMapper.java
@@ -408,7 +408,7 @@ public class DefaultRecordMapper<R extends Record, E> implements RecordMapper<R,
                         String name = parameter.call("getName").<String>get();
 
                         // [#8004] Clean up kotlin field name for boolean types
-                        if ("boolean".equals(type.getTypeName()) && name.startsWith("is")) {
+                        if ("boolean".equalsIgnoreCase(type.getTypeName()) && name.startsWith("is")) {
                             name = getPropertyName(name);
                         }
                         parameterNames.add(name);