diff --git a/kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MstAlgebra.kt b/kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MstAlgebra.kt
index a65027147..16fdfbeac 100644
--- a/kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MstAlgebra.kt
+++ b/kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MstAlgebra.kt
@@ -50,7 +50,7 @@ public object MstGroup : Group<MST>, NumericAlgebra<MST>, ScaleOperations<MST> {
  */
 @OptIn(UnstableKMathAPI::class)
 public object MstRing : Ring<MST>, NumbersAddOperations<MST>, ScaleOperations<MST> {
-    public override val zero: MST.Numeric = MstGroup.zero
+    public override val zero: MST.Numeric  get() = MstGroup.zero
     public override val one: MST.Numeric = number(1.0)
 
     public override fun number(value: Number): MST.Numeric = MstGroup.number(value)
@@ -109,8 +109,8 @@ public object MstField : Field<MST>, NumbersAddOperations<MST>, ScaleOperations<
  * [ExtendedField] over [MST] nodes.
  */
 public object MstExtendedField : ExtendedField<MST>, NumericAlgebra<MST> {
-    public override val zero: MST.Numeric = MstField.zero
-    public override val one: MST.Numeric = MstField.one
+    public override val zero: MST.Numeric get() = MstField.zero
+    public override val one: MST.Numeric get() = MstField.one
 
     public override fun bindSymbol(value: String): MST.Symbolic = MstField.bindSymbol(value)
     public override fun number(value: Number): MST.Numeric = MstRing.number(value)
diff --git a/kmath-viktor/src/main/kotlin/space/kscience/kmath/viktor/ViktorNDStructure.kt b/kmath-viktor/src/main/kotlin/space/kscience/kmath/viktor/ViktorNDStructure.kt
index f5697cea2..d791ed675 100644
--- a/kmath-viktor/src/main/kotlin/space/kscience/kmath/viktor/ViktorNDStructure.kt
+++ b/kmath-viktor/src/main/kotlin/space/kscience/kmath/viktor/ViktorNDStructure.kt
@@ -40,11 +40,9 @@ public class ViktorNDField(public override val shape: IntArray) : NDField<Double
             else -> produce { this@f64Buffer[it] }.f64Buffer
         }
 
-    public override val zero: ViktorNDStructure
-        get() = F64Array.full(init = 0.0, shape = shape).asStructure()
+    public override val zero: ViktorNDStructure by lazy { F64Array.full(init = 0.0, shape = shape).asStructure() }
 
-    public override val one: ViktorNDStructure
-        get() = F64Array.full(init = 1.0, shape = shape).asStructure()
+    public override val one: ViktorNDStructure by lazy { F64Array.full(init = 1.0, shape = shape).asStructure() }
 
     private val strides: Strides = DefaultStrides(shape)