diff --git a/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt b/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt
index ab6185520..5eb93bfc0 100644
--- a/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt
+++ b/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt
@@ -140,4 +140,8 @@ public fun <A : Attribute<Unit>> Attributes(
     attribute: A,
 ): Attributes = MapAttributes(mapOf(attribute to Unit))
 
-public operator fun Attributes.plus(other: Attributes): Attributes = MapAttributes(content + other.content)
\ No newline at end of file
+public operator fun Attributes.plus(other: Attributes): Attributes = when{
+    isEmpty() -> other
+    other.isEmpty() -> this
+    else -> MapAttributes(content + other.content)
+}
\ No newline at end of file