diff --git a/Sources/Metrics/Metrics.swift b/Sources/Metrics/Metrics.swift
index 7a3ea82..1ca0f0f 100644
--- a/Sources/Metrics/Metrics.swift
+++ b/Sources/Metrics/Metrics.swift
@@ -13,10 +13,16 @@
 //===----------------------------------------------------------------------===//
 
 @_exported import CoreMetrics
-import Foundation
+import Dispatch
 
 @_exported import class CoreMetrics.Timer
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
+import Foundation
+#endif
+
 extension Timer {
     /// Convenience for measuring duration of a closure.
     ///