diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/linear/EigenDecomposition.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/linear/EigenDecomposition.kt
index dcb97d24a..ee91c7d0f 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/linear/EigenDecomposition.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/linear/EigenDecomposition.kt
@@ -9,6 +9,7 @@ import space.kscience.attributes.PolymorphicAttribute
 import space.kscience.attributes.safeTypeOf
 import space.kscience.kmath.UnstableKMathAPI
 
+@UnstableKMathAPI
 public interface EigenDecomposition<T> {
     /**
      * Eigenvector matrix.
@@ -21,6 +22,7 @@ public interface EigenDecomposition<T> {
     public val d: Matrix<T>
 }
 
+@UnstableKMathAPI
 public class EigenDecompositionAttribute<T> :
     PolymorphicAttribute<EigenDecomposition<T>>(safeTypeOf()),
     MatrixAttribute<EigenDecomposition<T>>
diff --git a/kmath-ejml/src/jvmMain/kotlin/space/kscience/kmath/ejml/implementations.kt b/kmath-ejml/src/jvmMain/kotlin/space/kscience/kmath/ejml/implementations.kt
index 8588a7cda..f831f495f 100644
--- a/kmath-ejml/src/jvmMain/kotlin/space/kscience/kmath/ejml/implementations.kt
+++ b/kmath-ejml/src/jvmMain/kotlin/space/kscience/kmath/ejml/implementations.kt
@@ -474,6 +474,7 @@ public object EjmlLinearSpaceFDRM : EjmlLinearSpace<Float, Float32Field, FMatrix
 
     override fun Float.times(v: Point<Float>): EjmlFloatVector<FMatrixRMaj> = v * this
 
+    @OptIn(UnstableKMathAPI::class)
     override fun <V, A : StructureAttribute<V>> computeAttribute(structure: Structure2D<Float32>, attribute: A): V? {
         val origin = structure.toEjml().origin