diff --git a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt
index 1c5b9964771..b9d963098d5 100644
--- a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt
+++ b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt
@@ -10,7 +10,7 @@ import org.jetbrains.kotlin.fir.types.ConeClassLikeType
 import org.jetbrains.kotlin.fir.types.ConeKotlinTypeProjection
 import org.jetbrains.kotlin.fir.types.ConeNullability
 
-open class ConeClassLikeTypeImpl(
+class ConeClassLikeTypeImpl(
     override val lookupTag: ConeClassLikeLookupTag,
     override val typeArguments: Array<out ConeKotlinTypeProjection>,
     isNullable: Boolean