diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirTypeAliasExpandsToArrayOfNothingsChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirTypeAliasExpandsToArrayOfNothingsChecker.kt
index fa26f79bfb3..1c332054c13 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirTypeAliasExpandsToArrayOfNothingsChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirTypeAliasExpandsToArrayOfNothingsChecker.kt
@@ -8,12 +8,11 @@ package org.jetbrains.kotlin.fir.analysis.checkers.declaration
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
 import org.jetbrains.kotlin.diagnostics.reportOn
 import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
+import org.jetbrains.kotlin.fir.analysis.checkers.fullyExpandedClassId
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
 import org.jetbrains.kotlin.fir.declarations.FirTypeAlias
 import org.jetbrains.kotlin.fir.declarations.utils.expandedConeType
-import org.jetbrains.kotlin.fir.resolve.fullyExpandedType
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
-import org.jetbrains.kotlin.fir.types.classId
 import org.jetbrains.kotlin.fir.types.type
 import org.jetbrains.kotlin.name.StandardClassIds
 
@@ -27,12 +26,11 @@ object FirTypeAliasExpandsToArrayOfNothingsChecker : FirTypeAliasChecker() {
     }
 
     private fun ConeKotlinType.isMalformed(context: CheckerContext): Boolean =
-        expandedClassId(context) == StandardClassIds.Array
-                && typeArguments.singleOrNull()?.type?.expandedClassId(context) == StandardClassIds.Nothing
+        fullyExpandedClassId(context.session) == StandardClassIds.Array
+                && typeArguments.singleOrNull()?.type?.fullyExpandedClassId(context.session) == StandardClassIds.Nothing
                 || containsMalformedArgument(context)
 
     private fun ConeKotlinType.containsMalformedArgument(context: CheckerContext) =
         typeArguments.any { it.type?.isMalformed(context) == true }
 
-    private fun ConeKotlinType.expandedClassId(context: CheckerContext) = fullyExpandedType(context.session).classId
 }
\ No newline at end of file