diff --git a/addons/ot/include/conf.h b/addons/ot/include/conf.h
index 97df12e..a4bb7fc 100644
--- a/addons/ot/include/conf.h
+++ b/addons/ot/include/conf.h
@@ -57,10 +57,10 @@
 #define FLT_OT_DBG_CONF_PH(f,a) \
 	FLT_OT_DBG(3, f FLT_OT_CONF_HDR_FMT "%p }", FLT_OT_CONF_HDR_ARGS(a, id), (a)->ptr)
 
-#define FLT_OT_DBG_CONF_TRACER(f,a)                                                                                                   \
-	FLT_OT_DBG(3, f FLT_OT_CONF_HDR_FMT "'%s' '%s' %p %u %hhu %hhu 0x%02hhx %p:%s 0x%08x %s %s %s }",                             \
-	           FLT_OT_CONF_HDR_ARGS(a, id), (a)->config, (a)->plugin, (a)->tracer, (a)->rate_limit, (a)->flag_harderr,            \
-	           (a)->flag_disabled, (a)->logging, &((a)->proxy_log), flt_ot_list_debug(&((a)->proxy_log.logsrvs)), (a)->analyzers, \
+#define FLT_OT_DBG_CONF_TRACER(f,a)                                                                                                     \
+	FLT_OT_DBG(3, f FLT_OT_CONF_HDR_FMT "'%s' %p '%s' %p %u %hhu %hhu 0x%02hhx %p:%s 0x%08x %s %s %s }",                            \
+	           FLT_OT_CONF_HDR_ARGS(a, id), (a)->config, (a)->cfgbuf, (a)->plugin, (a)->tracer, (a)->rate_limit, (a)->flag_harderr, \
+	           (a)->flag_disabled, (a)->logging, &((a)->proxy_log), flt_ot_list_debug(&((a)->proxy_log.logsrvs)), (a)->analyzers,   \
 	           flt_ot_list_debug(&((a)->acls)), flt_ot_list_debug(&((a)->ph_groups)), flt_ot_list_debug(&((a)->ph_scopes)))
 
 #define FLT_OT_DBG_CONF(f,a)                                                  \
@@ -155,6 +155,7 @@
 struct flt_ot_conf_tracer {
 	FLT_OT_CONF_HDR(id);              /* The tracer name. */
 	char              *config;        /* The OpenTracing configuration file name. */
+	char              *cfgbuf;        /* The OpenTracing configuration. */
 	char              *plugin;        /* The OpenTracing plugin library file name. */
 	struct otc_tracer *tracer;        /* The OpenTracing tracer handle. */
 	uint32_t           rate_limit;    /* [0 2^32-1] <-> [0.0 100.0] */
diff --git a/addons/ot/include/opentracing.h b/addons/ot/include/opentracing.h
index 2dbf532..2b88a33 100644
--- a/addons/ot/include/opentracing.h
+++ b/addons/ot/include/opentracing.h
@@ -51,7 +51,8 @@
 void                     ot_text_map_show(const struct otc_text_map *text_map);
 void                     ot_debug(void);
 #endif
-int                      ot_init(struct otc_tracer **tracer, const char *config, const char *plugin, char **err);
+int                      ot_init(struct otc_tracer **tracer, const char *plugin, char **err);
+int                      ot_start(struct otc_tracer *tracer, const char *cfgbuf, char **err);
 struct otc_span         *ot_span_init(struct otc_tracer *tracer, const char *operation_name, const struct timespec *ts_steady, const struct timespec *ts_system, int ref_type, int ref_ctx_idx, const struct otc_span *ref_span, const struct otc_tag *tags, int num_tags, char **err);
 int                      ot_span_tag(struct otc_span *span, const struct otc_tag *tags, int num_tags);
 int                      ot_span_log(struct otc_span *span, const struct otc_log_field *log_fields, int num_fields);