diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/DescriptorByIdSignatureFinder.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/DescriptorByIdSignatureFinder.kt
index dbe3945f25a..e8acb890b44 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/DescriptorByIdSignatureFinder.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/DescriptorByIdSignatureFinder.kt
@@ -43,6 +43,7 @@ class DescriptorByIdSignatureFinder(
         when (signature) {
             is IdSignature.AccessorSignature -> findDescriptorForAccessorSignature(signature)
             is IdSignature.CommonSignature -> findDescriptorForPublicSignature(signature)
+            is IdSignature.CompositeSignature -> findDescriptorBySignature(signature.nearestPublicSig())
             else -> error("only PublicSignature or AccessorSignature should reach this point, got $signature")
         }