diff --git a/Sources/Services/Network/Server/AttachmentAllocator.swift b/Sources/Services/Network/Server/AttachmentAllocator.swift
index b7d3aeebb..1884f9ab6 100644
--- a/Sources/Services/Network/Server/AttachmentAllocator.swift
+++ b/Sources/Services/Network/Server/AttachmentAllocator.swift
@@ -53,7 +53,7 @@ actor AttachmentAllocator {
     }
 
     /// Retrieve the allocator index for a hostname.
-    func lookup(hostname: String) async throws -> UInt32? {
+    func lookup(hostname: String) throws -> UInt32? {
         hostnames[hostname]
     }
 }
diff --git a/Sources/Services/Network/Server/DefaultNetworkService.swift b/Sources/Services/Network/Server/DefaultNetworkService.swift
index 29f3fbe82..01519f205 100644
--- a/Sources/Services/Network/Server/DefaultNetworkService.swift
+++ b/Sources/Services/Network/Server/DefaultNetworkService.swift
@@ -127,7 +127,7 @@ public actor DefaultNetworkService: NetworkService {
         }
 
         // Invariant: hostname -> index if and only if index -> MAC address
-        let index = try await allocator.lookup(hostname: hostname)
+        let index = try allocator.lookup(hostname: hostname)
         guard let index else {
             return nil
         }