diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirClassLiteralChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirClassLiteralChecker.kt
index be40ae35c2b..9d05c5f0094 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirClassLiteralChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/expression/FirClassLiteralChecker.kt
@@ -15,13 +15,10 @@ import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
 import org.jetbrains.kotlin.fir.analysis.getChild
 import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
-import org.jetbrains.kotlin.fir.declarations.FirTypeParameter
-import org.jetbrains.kotlin.fir.declarations.FirTypeParameterRefsOwner
 import org.jetbrains.kotlin.fir.expressions.*
 import org.jetbrains.kotlin.fir.references.toResolvedTypeParameterSymbol
 import org.jetbrains.kotlin.fir.resolve.fullyExpandedType
 import org.jetbrains.kotlin.fir.scopes.impl.toConeType
-import org.jetbrains.kotlin.fir.symbols.SymbolInternals
 import org.jetbrains.kotlin.fir.symbols.impl.FirTypeParameterSymbol
 import org.jetbrains.kotlin.fir.symbols.lazyResolveToPhase
 import org.jetbrains.kotlin.fir.types.*
@@ -81,10 +78,8 @@ object FirClassLiteralChecker : FirGetClassCallChecker() {
         if (argument.typeArguments.isNotEmpty() && !resolvedFullyExpandedType.isAllowedInClassLiteral(context)) {
             val symbol = argument.symbol
             symbol?.lazyResolveToPhase(FirResolvePhase.TYPES)
-            @OptIn(SymbolInternals::class)
-            val typeParameters = (symbol?.fir as? FirTypeParameterRefsOwner)?.typeParameters
             // Among type parameter references, only count actual type parameter while discarding [FirOuterClassTypeParameterRef]
-            val expectedTypeArgumentSize = typeParameters?.count { it is FirTypeParameter } ?: 0
+            val expectedTypeArgumentSize = symbol?.ownTypeParameterSymbols?.size ?: 0
             if (expectedTypeArgumentSize != argument.typeArguments.size) {
                 if (symbol != null) {
                     reporter.reportOn(argument.source, FirErrors.WRONG_NUMBER_OF_TYPE_ARGUMENTS, expectedTypeArgumentSize, symbol, context)
diff --git a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt
index f4354f5c44d..26b9a4c14df 100644
--- a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt
+++ b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt
@@ -44,6 +44,9 @@ sealed class FirClassLikeSymbol<D : FirClassLikeDeclaration>(
     val typeParameterSymbols: List<FirTypeParameterSymbol>
         get() = fir.typeParameters.map { it.symbol }
 
+    val ownTypeParameterSymbols: List<FirTypeParameterSymbol>
+        get() = fir.typeParameters.mapNotNull { (it as? FirTypeParameter)?.symbol }
+
     override fun toString(): String = "${this::class.simpleName} ${classId.asString()}"
 }