diff --git a/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/stubBased/deserialization/StubBasedClassDeserialization.kt b/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/stubBased/deserialization/StubBasedClassDeserialization.kt
index 1c5918d1a3f..99edd9b2b39 100644
--- a/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/stubBased/deserialization/StubBasedClassDeserialization.kt
+++ b/analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/stubBased/deserialization/StubBasedClassDeserialization.kt
@@ -221,7 +221,8 @@ internal fun deserializeClassToSymbol(
             val zippedParameters =
                 classOrObject.primaryConstructorParameters zip declarations.filterIsInstance<FirProperty>()
             addDeclaration(
-                createDataClassCopyFunction(
+                // Explicit type arguments are needed to workaround KT-62544
+                createDataClassCopyFunction<Any, KtClassOrObject, KtParameter>(
                     classId,
                     classOrObject,
                     context.dispatchReceiver,
@@ -231,7 +232,7 @@ internal fun deserializeClassToSymbol(
                     createParameterTypeRefWithSourceKind = { property, newKind ->
                         property.returnTypeRef.copyWithNewSourceKind(newKind)
                     },
-                    toFirSource = { src, kind -> KtFakeSourceElement(src as PsiElement, kind) },
+                    toFirSource = { src: Any?, kind -> KtFakeSourceElement(src as PsiElement, kind) },
                     addValueParameterAnnotations = { annotations += context.annotationDeserializer.loadAnnotations(it) },
                     isVararg = { it.isVarArg },
                 )