diff --git a/contrib/opentracing/include/group.h b/contrib/opentracing/include/group.h
new file mode 100644
index 0000000..a9bfcc6
--- /dev/null
+++ b/contrib/opentracing/include/group.h
@@ -0,0 +1,61 @@
+/***
+ * Copyright 2020 HAProxy Technologies
+ *
+ * This file is part of the HAProxy OpenTracing filter.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+#ifndef _OPENTRACING_GROUP_H_
+#define _OPENTRACING_GROUP_H_
+
+#define FLT_OT_ACTION_GROUP   "ot-group"
+
+enum FLT_OT_ARG_enum {
+	FLT_OT_ARG_FILTER_ID = 0,
+	FLT_OT_ARG_GROUP_ID,
+
+	FLT_OT_ARG_FLT_CONF = 0,
+	FLT_OT_ARG_CONF,
+	FLT_OT_ARG_GROUP,
+};
+
+/*
+ * A description of the macro arguments can be found in the structure
+ * flt_ot_group_data definition
+ */
+#define FLT_OT_GROUP_DEFINES                                                     \
+	FLT_OT_GROUP_DEF(ACT_F_TCP_REQ_CON, SMP_VAL_FE_CON_ACC, SMP_OPT_DIR_REQ) \
+	FLT_OT_GROUP_DEF(ACT_F_TCP_REQ_SES, SMP_VAL_FE_SES_ACC, SMP_OPT_DIR_REQ) \
+	FLT_OT_GROUP_DEF(ACT_F_TCP_REQ_CNT, SMP_VAL_FE_REQ_CNT, SMP_OPT_DIR_REQ) \
+	FLT_OT_GROUP_DEF(ACT_F_TCP_RES_CNT, SMP_VAL_BE_RES_CNT, SMP_OPT_DIR_RES) \
+	FLT_OT_GROUP_DEF(ACT_F_HTTP_REQ,    SMP_VAL_FE_HRQ_HDR, SMP_OPT_DIR_REQ) \
+	FLT_OT_GROUP_DEF(ACT_F_HTTP_RES,    SMP_VAL_BE_HRS_HDR, SMP_OPT_DIR_RES)
+
+struct flt_ot_group_data {
+	enum act_from act_from;    /* ACT_F_* */
+	uint          smp_val;     /* Valid FE/BE fetch location. */
+	uint          smp_opt_dir; /* Fetch direction (request/response). */
+};
+
+#endif /* _OPENTRACING_GROUP_H_ */
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ *
+ * vi: noexpandtab shiftwidth=8 tabstop=8
+ */