diff --git a/docs/en/observability/apm/otel-direct.asciidoc b/docs/en/observability/apm/otel-direct.asciidoc
index 6dabf8e1e3..87d326a424 100644
--- a/docs/en/observability/apm/otel-direct.asciidoc
+++ b/docs/en/observability/apm/otel-direct.asciidoc
@@ -108,7 +108,7 @@ java -javaagent:/path/to/opentelemetry-javaagent-all.jar \
 
 | `OTEL_EXPORTER_OTLP_ENDPOINT` | APM Server URL. The host and port that APM Server listens for events on.
 
-| `OTEL_EXPORTER_OTLP_HEADERS` | Authorization header that includes the Elastic APM Secret token or API key: `"Authorization=Bearer an_apm_secret_token"` or `"Authorization=ApiKey an_api_key"`.
+| `OTEL_EXPORTER_OTLP_HEADERS` a| Authorization header that includes the Elastic APM Secret token or API key: `"Authorization=Bearer an_apm_secret_token"` or `"Authorization=ApiKey an_api_key"`.
 
 For information on how to format an API key, see
 {observability-guide}/apm-api-key.html[API keys].