diff --git a/swift/Sources/FlatBuffers/Message.swift b/swift/Sources/FlatBuffers/Message.swift
index eb0bad9..e9739de 100644
--- a/swift/Sources/FlatBuffers/Message.swift
+++ b/swift/Sources/FlatBuffers/Message.swift
@@ -14,7 +14,11 @@
  * limitations under the License.
  */
 
+#if !os(WASI)
 import Foundation
+#else
+import SwiftOverlayShims
+#endif
 
 /// FlatBufferGRPCMessage protocol that should allow us to invoke
 /// initializers directly from the GRPC generated code