diff --git a/Sources/OpenAPIRuntime/Conversion/Converter.swift b/Sources/OpenAPIRuntime/Conversion/Converter.swift
index 8dc638cb..2cf78d99 100644
--- a/Sources/OpenAPIRuntime/Conversion/Converter.swift
+++ b/Sources/OpenAPIRuntime/Conversion/Converter.swift
@@ -14,8 +14,8 @@
 #if canImport(Darwin)
 import Foundation
 #else
-// `@preconcrrency` is for `JSONDecoder`/`JSONEncoder`.
-@preconcurrency import Foundation
+@preconcurrency import class Foundation.JSONEncoder
+@preconcurrency import class Foundation.JSONDecoder
 #endif
 
 /// Converter between generated and HTTP currency types.
diff --git a/Sources/OpenAPIRuntime/Deprecated/Deprecated_RedactedHeaderFields.swift b/Sources/OpenAPIRuntime/Deprecated/Deprecated_RedactedHeaderFields.swift
index 0ae64e12..ccc7e115 100644
--- a/Sources/OpenAPIRuntime/Deprecated/Deprecated_RedactedHeaderFields.swift
+++ b/Sources/OpenAPIRuntime/Deprecated/Deprecated_RedactedHeaderFields.swift
@@ -14,7 +14,7 @@
 #if canImport(Darwin)
 import Foundation
 #else
-@preconcurrency import Foundation
+@preconcurrency import class Foundation.NSLock
 #endif
 
 /// A protected-by-locks storage for ``redactedHeaderFields``.
diff --git a/Sources/OpenAPIRuntime/Errors/ClientError.swift b/Sources/OpenAPIRuntime/Errors/ClientError.swift
index ce9ff17e..0bd5d349 100644
--- a/Sources/OpenAPIRuntime/Errors/ClientError.swift
+++ b/Sources/OpenAPIRuntime/Errors/ClientError.swift
@@ -14,8 +14,8 @@
 #if canImport(Darwin)
 import Foundation
 #else
-// `@preconcrrency` is for `URL`.
-@preconcurrency import Foundation
+@preconcurrency import struct Foundation.URL
+@preconcurrency import protocol Foundation.LocalizedError
 #endif
 
 /// An error thrown by a client performing an OpenAPI operation.
diff --git a/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift b/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift
index aab24761..65bc6584 100644
--- a/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift
+++ b/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift
@@ -14,8 +14,8 @@
 #if canImport(Darwin)
 import Foundation
 #else
-// `@preconcrrency` is for `Data`/`URLQueryItem`.
-@preconcurrency import Foundation
+@preconcurrency import struct Foundation.Data
+@preconcurrency import struct Foundation.URLQueryItem
 #endif
 
 /// A header field used in an HTTP request or response.
diff --git a/Sources/OpenAPIRuntime/Interface/UniversalClient.swift b/Sources/OpenAPIRuntime/Interface/UniversalClient.swift
index 9b1a7746..7e486328 100644
--- a/Sources/OpenAPIRuntime/Interface/UniversalClient.swift
+++ b/Sources/OpenAPIRuntime/Interface/UniversalClient.swift
@@ -14,8 +14,7 @@
 #if canImport(Darwin)
 import Foundation
 #else
-// `@preconcrrency` is for `URL`.
-@preconcurrency import Foundation
+@preconcurrency import struct Foundation.URL
 #endif
 
 /// OpenAPI document-agnostic HTTP client used by OpenAPI document-specific,
diff --git a/Sources/OpenAPIRuntime/Interface/UniversalServer.swift b/Sources/OpenAPIRuntime/Interface/UniversalServer.swift
index 7e57f5c4..e6c862b6 100644
--- a/Sources/OpenAPIRuntime/Interface/UniversalServer.swift
+++ b/Sources/OpenAPIRuntime/Interface/UniversalServer.swift
@@ -14,7 +14,8 @@
 #if canImport(Darwin)
 import Foundation
 #else
-@preconcurrency import Foundation
+@preconcurrency import struct Foundation.URL
+@preconcurrency import struct Foundation.URLComponents
 #endif
 
 /// OpenAPI document-agnostic HTTP server used by OpenAPI document-specific,