diff --git a/Sources/XXClient/Functors/GetFactsFromContact.swift b/Sources/XXClient/Functors/GetFactsFromContact.swift
index 697f799741f21feec1aba79346d6d842b7cc2338..84f0874946656dc6abcce91f127c6d35c869f5f5 100644
--- a/Sources/XXClient/Functors/GetFactsFromContact.swift
+++ b/Sources/XXClient/Functors/GetFactsFromContact.swift
@@ -4,7 +4,7 @@ import XCTestDynamicOverlay
 public struct GetFactsFromContact {
   public var run: (Data) throws -> [Fact]
 
-  public func callAsFunction(contact: Data) throws -> [Fact] {
+  public func callAsFunction(_ contact: Data) throws -> [Fact] {
     try run(contact)
   }
 }
diff --git a/Sources/XXClient/Functors/GetPublicKeyFromContact.swift b/Sources/XXClient/Functors/GetPublicKeyFromContact.swift
index 1ec9acaa82fa6d0f8dc2b6ee484706c99af757c0..a1fd2b89b3ceb8075c8857c95c98388b9bab80fc 100644
--- a/Sources/XXClient/Functors/GetPublicKeyFromContact.swift
+++ b/Sources/XXClient/Functors/GetPublicKeyFromContact.swift
@@ -4,7 +4,7 @@ import XCTestDynamicOverlay
 public struct GetPublicKeyFromContact {
   public var run: (Data) throws -> Data
 
-  public func callAsFunction(contact: Data) throws -> Data {
+  public func callAsFunction(_ contact: Data) throws -> Data {
     try run(contact)
   }
 }