diff --git a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/contracts/description/ConeContractRenderer.kt b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/contracts/description/ConeContractRenderer.kt
index 4654e0d4a08..05b9eabfbb3 100644
--- a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/contracts/description/ConeContractRenderer.kt
+++ b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/contracts/description/ConeContractRenderer.kt
@@ -5,8 +5,6 @@
 
 package org.jetbrains.kotlin.fir.contracts.description
 
-import org.jetbrains.kotlin.contracts.description.expressions.*
-
 class ConeContractRenderer(private val builder: StringBuilder) : ConeContractDescriptionVisitor<Unit, Nothing?>() {
     override fun visitConditionalEffectDeclaration(conditionalEffect: ConeConditionalEffectDeclaration, data: Nothing?) {
         conditionalEffect.effect.accept(this, data)
@@ -66,11 +64,11 @@ class ConeContractRenderer(private val builder: StringBuilder) : ConeContractDes
     }
 
     private fun ConeContractDescriptionElement.isAtom(): Boolean =
-        this is VariableReference || this is ConstantReference || this is ConeIsNullPredicate || this is ConeIsInstancePredicate
+        this is ConeValueParameterReference || this is ConeConstantReference || this is ConeIsNullPredicate || this is ConeIsInstancePredicate
 
     private fun needsBrackets(parent: ConeContractDescriptionElement, child: ConeContractDescriptionElement): Boolean {
         if (child.isAtom()) return false
         if (parent is ConeLogicalNot) return true
         return parent::class != child::class
     }
-}
\ No newline at end of file
+}