diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt
index ef2f76c4478..2206d831f43 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt
@@ -166,8 +166,7 @@ object SourceNavigationHelper {
             navigationKind: NavigationKind,
             index: StringStubIndexExtension<T>
     ): T? {
-        val classFqName = entity.fqName!!
-
+        val classFqName = entity.fqName ?: return null
         val scope = targetScope(entity, navigationKind) ?: return null
         return index.get(classFqName.asString(), entity.project, scope).firstOrNull()
     }