diff --git a/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/BaseIrGenerator.kt b/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/BaseIrGenerator.kt
index 47b4fdb8821..e52ab68aa53 100644
--- a/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/BaseIrGenerator.kt
+++ b/plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/BaseIrGenerator.kt
@@ -519,7 +519,7 @@ abstract class BaseIrGenerator(private val currentClass: IrClass, final override
                                         compilerContext,
                                         it
                                     )
-                                    instantiate(argSer, it)!!
+                                    instantiate(argSer, it) ?: return null
                                 })
                         )
                     }
diff --git a/plugins/kotlinx-serialization/testData/boxIr/contextualWithTypeParameters.kt b/plugins/kotlinx-serialization/testData/boxIr/contextualWithTypeParameters.kt
new file mode 100644
index 00000000000..77dfb1e83a0
--- /dev/null
+++ b/plugins/kotlinx-serialization/testData/boxIr/contextualWithTypeParameters.kt
@@ -0,0 +1,44 @@
+// TARGET_BACKEND: JVM_IR
+
+// WITH_STDLIB
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+import kotlinx.serialization.descriptors.*
+import kotlinx.serialization.modules.*
+import kotlinx.serialization.encoding.*
+
+class SomeData<T>(val t: T)
+
+@Serializable
+class PagedData<T>(
+    @Contextual val someData: SomeData<T>,
+)
+
+class SomeDataSerializer<T>(val tSer: KSerializer<T>) : KSerializer<SomeData<T>> {
+    override val descriptor: SerialDescriptor = buildClassSerialDescriptor("SomeData")
+
+    override fun serialize(encoder: Encoder, value: SomeData<T>) {
+        encoder as JsonEncoder
+        val data = encoder.json.encodeToJsonElement(tSer, value.t)
+        val obj = buildJsonObject {
+            put("innerType", tSer.descriptor.serialName)
+            put("data", data)
+        }
+        encoder.encodeJsonElement(obj)
+    }
+
+    override fun deserialize(decoder: Decoder): SomeData<T> {
+        TODO("Not yet implemented")
+    }
+}
+
+fun box(): String {
+    val module = SerializersModule {
+        contextual(SomeData::class) { args -> SomeDataSerializer(args[0]) }
+    }
+    val json = Json { serializersModule = module }
+    val input = PagedData<String>(SomeData("foo_bar"))
+    val enc = json.encodeToString(input)
+    return if (enc != """{"someData":{"innerType":"kotlin.String","data":"foo_bar"}}""") enc else "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 b88db08cbca..0d9fe0da0a0 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
@@ -57,6 +57,12 @@ public class SerializationFirLightTreeBlackBoxTestGenerated extends AbstractSeri
             runTest("plugins/kotlinx-serialization/testData/boxIr/contextualFallback.kt");
         }
 
+        @Test
+        @TestMetadata("contextualWithTypeParameters.kt")
+        public void testContextualWithTypeParameters() throws Exception {
+            runTest("plugins/kotlinx-serialization/testData/boxIr/contextualWithTypeParameters.kt");
+        }
+
         @Test
         @TestMetadata("delegatedInterface.kt")
         public void testDelegatedInterface() 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 5dd4777432a..2d2fa527aaf 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
@@ -55,6 +55,12 @@ public class SerializationIrBoxTestGenerated extends AbstractSerializationIrBoxT
         runTest("plugins/kotlinx-serialization/testData/boxIr/contextualFallback.kt");
     }
 
+    @Test
+    @TestMetadata("contextualWithTypeParameters.kt")
+    public void testContextualWithTypeParameters() throws Exception {
+        runTest("plugins/kotlinx-serialization/testData/boxIr/contextualWithTypeParameters.kt");
+    }
+
     @Test
     @TestMetadata("delegatedInterface.kt")
     public void testDelegatedInterface() throws Exception {