diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractKotlinCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractKotlinCodegen.java
index ea5082d6b13..d7708e5d28c 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractKotlinCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractKotlinCodegen.java
@@ -21,7 +21,6 @@ import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.google.common.collect.ImmutableMap;
 import com.samskivert.mustache.Mustache;
 import io.swagger.v3.oas.models.media.ArraySchema;
-import io.swagger.v3.oas.models.media.ComposedSchema;
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.media.StringSchema;
 import org.apache.commons.io.FilenameUtils;
@@ -30,7 +29,6 @@ import org.openapitools.codegen.*;
 import org.openapitools.codegen.model.ModelMap;
 import org.openapitools.codegen.model.ModelsMap;
 import org.openapitools.codegen.templating.mustache.EscapeChar;
-import org.openapitools.codegen.templating.mustache.JoinWithCommaLambda;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -524,7 +522,7 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
         }
 
         if (additionalProperties.containsKey(USE_JAKARTA_EE)) {
-            setUseJakartaEe(Boolean.TRUE.equals(additionalProperties.get(USE_JAKARTA_EE)));
+            setUseJakartaEe(Boolean.parseBoolean(additionalProperties.get(USE_JAKARTA_EE).toString()));
         }
         additionalProperties.put(USE_JAKARTA_EE, useJakartaEe);