diff --git a/backend.native/tests/interop/basics/3.kt b/backend.native/tests/interop/basics/3.kt
index 7d6f4557f13..7f3cb8d81f4 100644
--- a/backend.native/tests/interop/basics/3.kt
+++ b/backend.native/tests/interop/basics/3.kt
@@ -9,7 +9,7 @@ fun main(args: Array<String>) {
     val values = intArrayOf(14, 12, 9, 13, 8)
     val count = values.size
 
-    cstdlib.qsort(values.refTo(0), count.toULong(), IntVar.size.convert(), staticCFunction { a, b ->
+    cstdlib.qsort(values.refTo(0), count.convert(), IntVar.size.convert(), staticCFunction { a, b ->
         val aValue = a!!.reinterpret<IntVar>()[0]
         val bValue = b!!.reinterpret<IntVar>()[0]