diff --git a/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/instantiator/KotlinInstantiator.kt b/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/instantiator/KotlinInstantiator.kt
index ccc9f1b7e..7f98f5e06 100644
--- a/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/instantiator/KotlinInstantiator.kt
+++ b/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/instantiator/KotlinInstantiator.kt
@@ -41,19 +41,19 @@ import com.navercorp.fixturemonkey.api.property.Property
 import com.navercorp.fixturemonkey.api.property.PropertyUtils
 import com.navercorp.fixturemonkey.api.type.TypeReference
 import com.navercorp.fixturemonkey.api.type.Types
-import com.navercorp.fixturemonkey.api.type.Types.getDeclaredConstructor
 import com.navercorp.fixturemonkey.kotlin.introspector.CompanionObjectFactoryMethodIntrospector
 import com.navercorp.fixturemonkey.kotlin.introspector.KotlinPropertyArbitraryIntrospector
 import com.navercorp.fixturemonkey.kotlin.property.KotlinPropertyGenerator
 import com.navercorp.fixturemonkey.kotlin.type.actualType
+import com.navercorp.fixturemonkey.kotlin.type.declaredConstructor
 import com.navercorp.fixturemonkey.kotlin.type.toTypeReference
 import kotlin.reflect.KFunction
 import kotlin.reflect.KParameter
 import kotlin.reflect.KProperty
 import kotlin.reflect.full.companionObject
 import kotlin.reflect.full.memberFunctions
+import kotlin.reflect.jvm.javaConstructor
 import kotlin.reflect.jvm.javaType
-import kotlin.reflect.jvm.kotlinFunction
 
 class KotlinInstantiatorProcessor :
     InstantiatorProcessor {
@@ -74,8 +74,7 @@ class KotlinInstantiatorProcessor :
     ): InstantiatorProcessResult {
         val parameterTypes =
             instantiator.inputParameterTypes.map { it.type.actualType() }.toTypedArray()
-        val declaredConstructor = getDeclaredConstructor(typeReference.type.actualType(), *parameterTypes)
-        val kotlinConstructor = declaredConstructor.kotlinFunction!!
+        val kotlinConstructor: KFunction<*> = typeReference.type.actualType().declaredConstructor(*parameterTypes)
         val parameters: List<KParameter> = kotlinConstructor.parameters
 
         val inputParameterTypes = instantiator.inputParameterTypes
@@ -85,14 +84,13 @@ class KotlinInstantiatorProcessor :
 
         val resolveParameterTypes = resolveParameterTypes(parameterTypeReferences, inputParameterTypes)
         val resolveParameterName = resolvedParameterNames(parameterNames, inputParameterNames)
-
         val constructorParameterProperties = parameters.mapIndexed { index, kParameter ->
             val resolvedParameterTypeReference = resolveParameterTypes[index]
             val resolvedParameterName = resolveParameterName[index]
 
             ConstructorProperty(
                 resolvedParameterTypeReference.annotatedType,
-                declaredConstructor,
+                kotlinConstructor.javaConstructor,
                 resolvedParameterName,
                 null,
                 kParameter.type.isMarkedNullable,
@@ -101,7 +99,7 @@ class KotlinInstantiatorProcessor :
 
         val constructorArbitraryIntrospector = ConstructorArbitraryIntrospector(
             ConstructorWithParameterNames(
-                declaredConstructor,
+                kotlinConstructor.javaConstructor,
                 resolveParameterName,
             ),
         )
diff --git a/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/type/KotlinTypes.kt b/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/type/KotlinTypes.kt
index 3d4524aca..c98040ee4 100644
--- a/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/type/KotlinTypes.kt
+++ b/fixture-monkey-kotlin/src/main/kotlin/com/navercorp/fixturemonkey/kotlin/type/KotlinTypes.kt
@@ -28,6 +28,7 @@ import java.lang.reflect.ParameterizedType
 import java.lang.reflect.Type
 import java.lang.reflect.TypeVariable
 import kotlin.reflect.KFunction
+import kotlin.reflect.KParameter
 import kotlin.reflect.KProperty
 import kotlin.reflect.KType
 import kotlin.reflect.full.findAnnotations
@@ -172,3 +173,15 @@ fun KType.toTypeReference(): TypeReference<*> = object : TypeReference<Any?>() {
         return this@toTypeReference.javaType.toAnnotatedType()
     }
 }
+
+fun Class<*>.declaredConstructor(
+    vararg arguments: Class<*>,
+): KFunction<*> = this.kotlin.constructors
+    .firstOrNull { constructor ->
+        Types.isAssignableTypes(
+            arguments,
+            constructor.parameters.filter { it.kind != KParameter.Kind.INSTANCE }
+                .map { it.type.javaType.actualType() }
+                .toTypedArray(),
+        )
+    } ?: this.kotlin.constructors.first()
diff --git a/fixture-monkey-tests/kotlin-tests/src/test/kotlin/com/navercorp/fixturemonkey/tests/kotlin/InstantiatorTest.kt b/fixture-monkey-tests/kotlin-tests/src/test/kotlin/com/navercorp/fixturemonkey/tests/kotlin/InstantiatorTest.kt
index 52560c966..6383ef83e 100644
--- a/fixture-monkey-tests/kotlin-tests/src/test/kotlin/com/navercorp/fixturemonkey/tests/kotlin/InstantiatorTest.kt
+++ b/fixture-monkey-tests/kotlin-tests/src/test/kotlin/com/navercorp/fixturemonkey/tests/kotlin/InstantiatorTest.kt
@@ -3,8 +3,8 @@ package com.navercorp.fixturemonkey.tests.kotlin
 import com.navercorp.fixturemonkey.FixtureMonkey
 import com.navercorp.fixturemonkey.api.instantiator.Instantiator
 import com.navercorp.fixturemonkey.kotlin.KotlinPlugin
-import com.navercorp.fixturemonkey.kotlin.instantiator.instantiateBy
 import com.navercorp.fixturemonkey.kotlin.giveMeBuilder
+import com.navercorp.fixturemonkey.kotlin.instantiator.instantiateBy
 import com.navercorp.fixturemonkey.tests.TestEnvironment.TEST_COUNT
 import org.assertj.core.api.BDDAssertions.then
 import org.junit.jupiter.api.RepeatedTest
@@ -419,6 +419,18 @@ class InstantiatorTest {
         then(actual).isNotNull()
     }
 
+    @RepeatedTest(TEST_COUNT)
+    fun instantiateWithDefaultArgument() {
+        class ConstructorObject(val value: String = "default")
+
+        val actual = SUT.giveMeBuilder<ConstructorObject>()
+            .instantiateBy { constructor() }
+            .sample()
+            .value
+
+        then(actual).isNotNull
+    }
+
     class Foo(val foo: String, val bar: Int) {
         constructor(foo: String) : this(foo, 1)