diff --git a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/file/structure/FileStructureElement.kt b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/file/structure/FileStructureElement.kt
index ebbc8a6f04e..999d4e0cad8 100644
--- a/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/file/structure/FileStructureElement.kt
+++ b/idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/file/structure/FileStructureElement.kt
@@ -138,6 +138,7 @@ internal class NonReanalyzableDeclarationStructureElement(
             firFile,
             onDeclarationEnter = { firDeclaration ->
                 when {
+                    firDeclaration is FirFile -> DiagnosticCollectorDeclarationAction.CHECK_CURRENT_DECLARATION_AND_CHECK_NESTED
                     firDeclaration == fir -> {
                         inCurrentDeclaration = true
                         DiagnosticCollectorDeclarationAction.CHECK_CURRENT_DECLARATION_AND_CHECK_NESTED