diff --git a/plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule_multipleFields.kt b/plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule_multipleFields.kt
new file mode 100644
index 00000000000..3637bcc0fb0
--- /dev/null
+++ b/plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule_multipleFields.kt
@@ -0,0 +1,42 @@
+// TARGET_BACKEND: JVM_IR
+// WITH_STDLIB
+// ISSUE: KT-57626
+
+// MODULE: lib
+import kotlinx.serialization.*
+
+@Serializable
+open class Base(
+    val c: Int = 1,
+    val b: String = "hello",
+    val a: List<String> = listOf("a")
+)
+
+// MODULE: main(lib)
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+
+@Serializable
+class Derived(val d: Long = 1000000000000) : Base(2, "world", listOf("b", "c")) {
+    override fun equals(other: Any?): Boolean {
+        if (other !is Derived) return false
+        return a == other.a && b == other.b && c == other.c && d == other.d
+    }
+
+    override fun toString(): String {
+        return "a: $a, b: $b, c: $c, d: $d"
+    }
+}
+
+fun box(): String {
+    val expected = Derived(12)
+    val result = Json.encodeToString(Derived.serializer(), expected)
+    if (result != """{"c":2,"b":"world","a":["b","c"],"d":12}""") {
+        return "Fail: $result"
+    }
+    val actual = Json.decodeFromString(Derived.serializer(), result)
+    if (expected != actual) {
+        return "Fail: expected: $expected\nactual: $actual"
+    }
+    return "OK"
+}
diff --git a/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationFirLightTreeBlackBoxTestGenerated.java b/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationFirLightTreeBlackBoxTestGenerated.java
index ba153327a3f..3de8f0ac03a 100644
--- a/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationFirLightTreeBlackBoxTestGenerated.java
+++ b/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationFirLightTreeBlackBoxTestGenerated.java
@@ -213,6 +213,12 @@ public class SerializationFirLightTreeBlackBoxTestGenerated extends AbstractSeri
             runTest("plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule.kt");
         }
 
+        @Test
+        @TestMetadata("serializableFromAnotherModule_multipleFields.kt")
+        public void testSerializableFromAnotherModule_multipleFields() throws Exception {
+            runTest("plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule_multipleFields.kt");
+        }
+
         @Test
         @TestMetadata("serializableOnPropertyType.kt")
         public void testSerializableOnPropertyType() throws Exception {
diff --git a/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationIrBoxTestGenerated.java b/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationIrBoxTestGenerated.java
index 57ade1a1ef7..3279019cd55 100644
--- a/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationIrBoxTestGenerated.java
+++ b/plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationIrBoxTestGenerated.java
@@ -211,6 +211,12 @@ public class SerializationIrBoxTestGenerated extends AbstractSerializationIrBoxT
         runTest("plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule.kt");
     }
 
+    @Test
+    @TestMetadata("serializableFromAnotherModule_multipleFields.kt")
+    public void testSerializableFromAnotherModule_multipleFields() throws Exception {
+        runTest("plugins/kotlinx-serialization/testData/boxIr/serializableFromAnotherModule_multipleFields.kt");
+    }
+
     @Test
     @TestMetadata("serializableOnPropertyType.kt")
     public void testSerializableOnPropertyType() throws Exception {