diff --git a/docs/en/observability/apm/otel-direct.asciidoc b/docs/en/observability/apm/otel-direct.asciidoc
index ca50c0eb83..f2f551ea32 100644
--- a/docs/en/observability/apm/otel-direct.asciidoc
+++ b/docs/en/observability/apm/otel-direct.asciidoc
@@ -113,7 +113,7 @@ java -javaagent:/path/to/opentelemetry-javaagent-all.jar \
 For information on how to format an API key, see
 {observability-guide}/api-key.html[API keys].
 
-Please note the required space between `Bearer` and `an_apm_secret_token`, and `APIKey` and `an_api_key`.
+Please note the required space between `Bearer` and `an_apm_secret_token`, and `ApiKey` and `an_api_key`.
 
 | `OTEL_METRICS_EXPORTER` | Metrics exporter to use. See https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/#exporter-selection[exporter selection] for more information.