diff --git a/Package.swift b/Package.swift
index 1a1ef2ba..65e12789 100644
--- a/Package.swift
+++ b/Package.swift
@@ -35,6 +35,7 @@ let package = Package(
             dependencies: [
                 .product(name: "ServiceContextModule", package: "swift-service-context"),
                 .target(name: "Instrumentation"),
+                .target(name: "_CWASI", condition: .when(platforms: [.wasi])),
             ]
         ),
         .testTarget(
@@ -43,6 +44,15 @@ let package = Package(
                 .target(name: "Tracing")
             ]
         ),
+
+        // ==== --------------------------------------------------------------------------------------------------------
+        // MARK: Wasm Support
+
+        // Provides C shims for compiling to wasm
+        .target(
+            name: "_CWASI",
+            dependencies: []
+        ),
     ]
 )
 
diff --git a/Sources/Instrumentation/Locks.swift b/Sources/Instrumentation/Locks.swift
index 0a3f866c..8f36ad9a 100644
--- a/Sources/Instrumentation/Locks.swift
+++ b/Sources/Instrumentation/Locks.swift
@@ -34,6 +34,11 @@ import Glibc
 import Android
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(WASILibc)
+    import WASILibc
+    #if canImport(wasi_pthread)
+        import wasi_pthread
+    #endif
 #else
 #error("Unsupported runtime")
 #endif
diff --git a/Sources/Tracing/NoOpTracer.swift b/Sources/Tracing/NoOpTracer.swift
index 244f4ef0..746a48c2 100644
--- a/Sources/Tracing/NoOpTracer.swift
+++ b/Sources/Tracing/NoOpTracer.swift
@@ -12,7 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-import Dispatch
 @_exported import Instrumentation
 @_exported import ServiceContextModule
 
diff --git a/Sources/Tracing/Tracer.swift b/Sources/Tracing/Tracer.swift
index e87c8c61..1fee0788 100644
--- a/Sources/Tracing/Tracer.swift
+++ b/Sources/Tracing/Tracer.swift
@@ -12,7 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-import Dispatch
 @_exported import Instrumentation
 @_exported import ServiceContextModule
 
diff --git a/Sources/Tracing/TracerProtocol+Legacy.swift b/Sources/Tracing/TracerProtocol+Legacy.swift
index 79b61b18..2ddab18e 100644
--- a/Sources/Tracing/TracerProtocol+Legacy.swift
+++ b/Sources/Tracing/TracerProtocol+Legacy.swift
@@ -12,7 +12,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-import Dispatch
 @_exported import Instrumentation
 @_exported import ServiceContextModule
 
diff --git a/Sources/Tracing/TracingTime.swift b/Sources/Tracing/TracingTime.swift
index c4887e5e..7f99c8e2 100644
--- a/Sources/Tracing/TracingTime.swift
+++ b/Sources/Tracing/TracingTime.swift
@@ -23,10 +23,16 @@ import Glibc
 import Android
 #elseif canImport(Musl)
 import Musl
+#elseif canImport(WASILibc)
+    import WASILibc
 #else
 #error("Unsupported runtime")
 #endif
 
+#if canImport(_CWASI)
+    import _CWASI
+#endif
+
 public protocol TracerInstant: Comparable, Hashable, Sendable {
     /// Representation of this instant as the number of nanoseconds since UNIX Epoch (January 1st 1970)
     var nanosecondsSinceEpoch: UInt64 { get }
@@ -84,7 +90,11 @@ public struct DefaultTracerClock {
 
     public var now: Self.Instant {
         var ts = timespec()
-        clock_gettime(CLOCK_REALTIME, &ts)
+        #if os(WASI)
+            CWASI_clock_gettime_realtime(&ts)
+        #else
+            clock_gettime(CLOCK_REALTIME, &ts)
+        #endif
         /// We use unsafe arithmetic here because `UInt64.max` nanoseconds is more than 580 years,
         /// and the odds that this code will still be running 530 years from now is very, very low,
         /// so as a practical matter this will never overflow.
diff --git a/Sources/_CWASI/_CWASI.c b/Sources/_CWASI/_CWASI.c
new file mode 100644
index 00000000..7d1b4a88
--- /dev/null
+++ b/Sources/_CWASI/_CWASI.c
@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift Distributed Tracing open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift Distributed Tracing project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift Distributed Tracing project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
diff --git a/Sources/_CWASI/include/_CWASI.h b/Sources/_CWASI/include/_CWASI.h
new file mode 100644
index 00000000..70553cf3
--- /dev/null
+++ b/Sources/_CWASI/include/_CWASI.h
@@ -0,0 +1,27 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift Distributed Tracing open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift Distributed Tracing project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift Distributed Tracing project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+#pragma once
+
+#if __wasi__
+
+#include <fcntl.h>
+#include <time.h>
+
+static inline void CWASI_clock_gettime_realtime(struct timespec *tv) {
+    // ClangImporter doesn't support `CLOCK_REALTIME` declaration in WASILibc, thus we have to define a bridge manually
+    clock_gettime(CLOCK_REALTIME, tv);
+}
+
+#endif // __wasi__