diff --git a/Sources/Snowdrop/SnowdropMacros.swift b/Sources/Snowdrop/SnowdropMacros.swift
index 79d5bb9..8e9c85d 100644
--- a/Sources/Snowdrop/SnowdropMacros.swift
+++ b/Sources/Snowdrop/SnowdropMacros.swift
@@ -8,7 +8,7 @@
 import Foundation
 
 // MARK: - Service macro
-@attached(peer, names: arbitrary)
+@attached(peer, names: suffixed(Service), suffixed(ServiceImpl))
 public macro Service() = #externalMacro(module: "SnowdropMacros", type: "ServiceMacro")
 
 // MARK: - Mockable macro