diff --git a/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/EmpiricalModeDecomposition.kt b/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/EmpiricalModeDecomposition.kt
index 179f4ae43..d1f4f43d2 100644
--- a/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/EmpiricalModeDecomposition.kt
+++ b/kmath-stat/src/commonMain/kotlin/space/kscience/kmath/series/EmpiricalModeDecomposition.kt
@@ -91,7 +91,7 @@ public class EmpiricalModeDecomposition<BA, L: Number> (
     /**
      * Compute a single iteration of the sifting process.
      */
-    private fun siftInner(
+    private tailrec fun siftInner(
         prevMode: Series<Double>,
         iterationNumber: Int,
         sNumber: Int