diff --git a/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/CoapOptionInjectExtractAdapter.java b/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/CoapOptionInjectExtractAdapter.java
index bfee8a322b8..724a4b867b3 100644
--- a/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/CoapOptionInjectExtractAdapter.java
+++ b/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/CoapOptionInjectExtractAdapter.java
@@ -23,7 +23,7 @@
 import io.opentracing.propagation.Binary;
 
 /**
- * An adapter for injecting/extracting an OpenTracing span context to/from a CoAP option.
+ * An adapter for injecting/extracting an OpenTracing {@code SpanContext} to/from a CoAP option.
  * <p>
  * The option number being used to hold the context is {@link #OPTION_TRACE_CONTEXT}.
  *
diff --git a/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/TracingSupportingHonoResource.java b/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/TracingSupportingHonoResource.java
index 0ae61e00dd9..dd7165cce79 100644
--- a/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/TracingSupportingHonoResource.java
+++ b/adapters/coap-vertx-base/src/main/java/org/eclipse/hono/adapter/coap/TracingSupportingHonoResource.java
@@ -78,7 +78,7 @@ public Resource getChild(final String name) {
     }
 
     private SpanContext extractSpanContextFromRequest(final OptionSet requestOptions) {
-        return tracer.extract(Format.Builtin.BINARY_EXTRACT, new CoapOptionInjectExtractAdapter(requestOptions));
+        return tracer.extract(Format.Builtin.BINARY, new CoapOptionInjectExtractAdapter(requestOptions));
     }
 
     private Span newSpan(final Exchange exchange) {