diff --git a/compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/InsertImplicitCasts.kt b/compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/InsertImplicitCasts.kt
index 9896f67340c..43ffa8c6159 100644
--- a/compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/InsertImplicitCasts.kt
+++ b/compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/transformations/InsertImplicitCasts.kt
@@ -245,9 +245,6 @@ open class InsertImplicitCasts(
             KotlinBuiltIns.isInt(valueType) && notNullableExpectedType.isBuiltInIntegerType() ->
                 implicitCast(notNullableExpectedType, IrTypeOperator.IMPLICIT_INTEGER_COERCION)
 
-            KotlinTypeChecker.DEFAULT.isSubtypeOf(valueType, expectedType) ->
-                this
-
             else -> {
                 val targetType = if (!valueType.containsNull()) notNullableExpectedType else expectedType
                 implicitCast(targetType, IrTypeOperator.IMPLICIT_CAST)