diff --git a/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/asm/AsmExpressionSpaces.kt b/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/asm/AsmExpressionSpaces.kt
index 24260b871..78f6ee351 100644
--- a/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/asm/AsmExpressionSpaces.kt
+++ b/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/asm/AsmExpressionSpaces.kt
@@ -47,7 +47,7 @@ open class AsmExpressionRing<T>(private val ring: Ring<T>) : AsmExpressionSpace<
     override fun binaryOperation(operation: String, left: AsmExpression<T>, right: AsmExpression<T>): AsmExpression<T> =
         AsmBinaryOperation(algebra, operation, left, right)
 
-    fun number(value: Number): AsmExpression<T> = const(ring { one * value })
+    override fun number(value: Number): AsmExpression<T> = const(ring { one * value })
 
     override fun multiply(a: AsmExpression<T>, b: AsmExpression<T>): AsmExpression<T> =
         AsmBinaryOperation(space, RingOperations.TIMES_OPERATION, a, b)
diff --git a/kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/FunctionalExpressions.kt b/kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/FunctionalExpressions.kt
index d20a5dbbf..ce9b4756c 100644
--- a/kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/FunctionalExpressions.kt
+++ b/kmath-core/src/commonMain/kotlin/scientifik/kmath/expressions/FunctionalExpressions.kt
@@ -75,7 +75,7 @@ open class FunctionalExpressionRing<T>(val ring: Ring<T>) : FunctionalExpression
     override fun binaryOperation(operation: String, left: Expression<T>, right: Expression<T>): Expression<T> =
         FunctionalBinaryOperation(algebra, operation, left, right)
 
-    fun number(value: Number): Expression<T> = const(ring { one * value })
+    override fun number(value: Number): Expression<T> = const(ring { one * value })
 
     override fun multiply(a: Expression<T>, b: Expression<T>): Expression<T> =
         FunctionalBinaryOperation(space, RingOperations.TIMES_OPERATION, a, b)