diff --git a/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/deserialization/KotlinDeserializedJvmSymbolsProvider.kt b/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/deserialization/KotlinDeserializedJvmSymbolsProvider.kt
index 1682b8b4c8d..a4bec8a7b20 100644
--- a/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/deserialization/KotlinDeserializedJvmSymbolsProvider.kt
+++ b/compiler/fir/java/src/org/jetbrains/kotlin/fir/java/deserialization/KotlinDeserializedJvmSymbolsProvider.kt
@@ -46,6 +46,7 @@ import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmProtoBufUtil
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.name.isOneSegmentFQN
 import org.jetbrains.kotlin.resolve.constants.ClassLiteralValue
 import org.jetbrains.kotlin.resolve.jvm.JvmClassName
 import org.jetbrains.kotlin.serialization.deserialization.IncompatibleVersionErrorData
@@ -157,6 +158,7 @@ class KotlinDeserializedJvmSymbolsProvider(
     private fun findAndDeserializeTypeAlias(
         classId: ClassId
     ): FirTypeAliasSymbol? {
+        if (!classId.relativeClassName.isOneSegmentFQN()) return null
         return typeAliasCache.getOrPutNullable(classId) {
             getPackageParts(classId.packageFqName).firstNotNullResult { part ->
                 val ids = part.typeAliasNameIndex[classId.shortClassName]