api/trace: fix single include header define.
* limitations under the License.
*/
-#ifndef FLB_HS_API_V1_PLUGINS_H
-#define FLB_HS_API_V1_PLUGINS_H
+#ifndef FLB_HS_API_V1_TRACE_H
+#define FLB_HS_API_V1_TRACE_H
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_http_server.h>
