diff --git a/MIGRATION.md b/MIGRATION.md
index c1dc5b4415ae..0fb51fd6c4c7 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -151,6 +151,7 @@ In v8, the Span class is heavily reworked. The following properties & methods ar
 - `span.data`: Use `spanToJSON(span).data` instead.
 - `span.setTag()`: Use `span.setAttribute()` instead or set tags on the surrounding scope.
 - `span.setData()`: Use `span.setAttribute()` instead.
+- `span.instrumenter` This field was removed and will be replaced internally.
 - `transaction.setContext()`: Set context on the surrounding scope instead.
 
 ## Deprecate `pushScope` & `popScope` in favor of `withScope`
diff --git a/packages/core/src/tracing/span.ts b/packages/core/src/tracing/span.ts
index 10a4d97efa08..c3cd71e87699 100644
--- a/packages/core/src/tracing/span.ts
+++ b/packages/core/src/tracing/span.ts
@@ -110,6 +110,12 @@ export class Span implements SpanInterface {
 
   /**
    * The instrumenter that created this span.
+   *
+   * TODO (v8): This can probably be replaced by an `instanceOf` check of the span class.
+   *            the instrumenter can only be sentry or otel so we can check the span instance
+   *            to verify which one it is and remove this field entirely.
+   *
+   * @deprecated This field will be removed.
    */
   public instrumenter: Instrumenter;
 
@@ -142,6 +148,7 @@ export class Span implements SpanInterface {
     // eslint-disable-next-line deprecation/deprecation
     this.data = spanContext.data ? { ...spanContext.data } : {};
     this._attributes = spanContext.attributes ? { ...spanContext.attributes } : {};
+    // eslint-disable-next-line deprecation/deprecation
     this.instrumenter = spanContext.instrumenter || 'sentry';
     this.origin = spanContext.origin || 'manual';
     // eslint-disable-next-line deprecation/deprecation
diff --git a/packages/types/src/span.ts b/packages/types/src/span.ts
index 3f54322886bb..662cfb57a155 100644
--- a/packages/types/src/span.ts
+++ b/packages/types/src/span.ts
@@ -221,6 +221,8 @@ export interface Span extends SpanContext {
 
   /**
    * The instrumenter that created this span.
+   *
+   * @deprecated this field will be removed.
    */
   instrumenter: Instrumenter;