diff --git a/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt b/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
index 98aa3706b..9ab6f26c9 100644
--- a/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
+++ b/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
@@ -66,6 +66,30 @@ class AsmTest {
         mapOf("x" to 5.0)
     )
 
+    @Test
+    fun testCProductWithOtherTypeNumber() = testDoubleExpressionValue(
+        25.0,
+        AsmConstProductExpression(AsmVariableExpression("x"), 5f),
+        mapOf("x" to 5.0)
+    )
+
+    object CustomZero : Number() {
+        override fun toByte(): Byte = 0
+        override fun toChar(): Char = 0.toChar()
+        override fun toDouble(): Double = 0.0
+        override fun toFloat(): Float = 0f
+        override fun toInt(): Int = 0
+        override fun toLong(): Long = 0L
+        override fun toShort(): Short = 0
+    }
+
+    @Test
+    fun testCProductWithCustomTypeNumber() = testDoubleExpressionValue(
+        0.0,
+        AsmConstProductExpression(AsmVariableExpression("x"), CustomZero),
+        mapOf("x" to 5.0)
+    )
+
     @Test
     fun testVar() = testDoubleExpressionValue(
         10000.0,