diff --git a/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/samplers/ZigguratNormalizedGaussianSampler.kt b/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/samplers/ZigguratNormalizedGaussianSampler.kt
index 2d5750bc7..bda6f9819 100644
--- a/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/samplers/ZigguratNormalizedGaussianSampler.kt
+++ b/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/samplers/ZigguratNormalizedGaussianSampler.kt
@@ -59,7 +59,7 @@ public object ZigguratNormalizedGaussianSampler : NormalizedGaussianSampler {
 
     private fun sampleOne(generator: RandomGenerator): Double {
         val j = generator.nextLong()
-        val i = (j and LAST.toLong()).toIntExact()
+        val i = (j and LAST.toLong()).toInt()
         return if (abs(j) < K[i]) j * W[i] else fix(generator, j, i)
     }