diff --git a/.changeset/hip-needles-smile.md b/.changeset/hip-needles-smile.md
new file mode 100644
index 00000000000..f824487d6c8
--- /dev/null
+++ b/.changeset/hip-needles-smile.md
@@ -0,0 +1,5 @@
+---
+"@effect/opentelemetry": patch
+---
+
+Fix WebSdk.layer not properly infering when passing an evaluate argument of type Effect
diff --git a/packages/opentelemetry/src/WebSdk.ts b/packages/opentelemetry/src/WebSdk.ts
index 54406ceaf70..d4c7d637151 100644
--- a/packages/opentelemetry/src/WebSdk.ts
+++ b/packages/opentelemetry/src/WebSdk.ts
@@ -66,9 +66,9 @@ export const layerTracerProvider = (
  */
 export const layer: {
   (evaluate: LazyArg<Configuration>): Layer.Layer<Resource.Resource>
-  <R, E>(evaluate: Effect.Effect<R, E, Configuration>): Layer.Layer<Resource.Resource, E, R>
+  <E, R>(evaluate: Effect.Effect<Configuration, E, R>): Layer.Layer<Resource.Resource, E, R>
 } = (
-  evaluate: LazyArg<Configuration> | Effect.Effect<any, any, Configuration>
+  evaluate: LazyArg<Configuration> | Effect.Effect<Configuration, any, any>
 ): Layer.Layer<Resource.Resource> =>
   Layer.unwrapEffect(
     Effect.map(