diff --git a/kotlin-native/performance/ring/src/main/kotlin/org/jetbrains/ring/OctoTest/ocTree.kt b/kotlin-native/performance/ring/src/main/kotlin/org/jetbrains/ring/OctoTest/ocTree.kt
index 37ad4f6630e..360262ffe9b 100644
--- a/kotlin-native/performance/ring/src/main/kotlin/org/jetbrains/ring/OctoTest/ocTree.kt
+++ b/kotlin-native/performance/ring/src/main/kotlin/org/jetbrains/ring/OctoTest/ocTree.kt
@@ -96,6 +96,7 @@ open class OctoTree<T>(val depth: Int) {
                         }
                         nodes[branchIndex] = Branch(node.value, number(x, y, z, depth - 1))
                     }
+                    else -> {}
                 }
 
                 if (nodes[branchIndex]!!.set(x, y, z, value, depth - 1)) {