diff --git a/docs/cordis-catalog/services.md b/docs/cordis-catalog/services.md
index 0034bbc259..1fe0987ddc 100644
--- a/docs/cordis-catalog/services.md
+++ b/docs/cordis-catalog/services.md
@@ -187,7 +187,7 @@ Registry service (`ctx.systemPrompt`): plugins contribute ordered text sections,
 section(section: PromptSection): () => void
 tools(provider: () => ToolSchema[]): () => void
 variable(name: string, provider: (context: AssembleContext) => string | undefined): () => void
-assemble(context: AssembleContext = {}): Promise<PromptAssembly>
+async assemble(context: AssembleContext = {}): Promise<PromptAssembly>
 ```
 
 Source: [`packages/core/system-prompt/src/index.ts:279`](../../packages/core/system-prompt/src/index.ts)