diff --git a/src/transport/af-mctp.c b/src/transport/af-mctp.c
index f499a72..5084f7d 100644
--- a/src/transport/af-mctp.c
+++ b/src/transport/af-mctp.c
@@ -1,4 +1,5 @@
-#include "../mctp-defines.h"
+#include "config.h"
+#include "mctp-defines.h"
 #include "base.h"
 #include "container-of.h"
 #include "libpldm/pldm.h"
@@ -25,12 +26,14 @@
 #define transport_to_af_mctp(ptr)                                              \
 	container_of(ptr, struct pldm_transport_af_mctp, transport)
 
+LIBPLDM_ABI_TESTING
 struct pldm_transport *
 pldm_transport_af_mctp_core(struct pldm_transport_af_mctp *ctx)
 {
 	return &ctx->transport;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_af_mctp_init_pollfd(struct pldm_transport *t,
 				       struct pollfd *pollfd)
 {
@@ -54,6 +57,7 @@
 	return -1;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_af_mctp_map_tid(struct pldm_transport_af_mctp *ctx,
 				   pldm_tid_t tid, mctp_eid_t eid)
 {
@@ -62,6 +66,7 @@
 	return 0;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_af_mctp_unmap_tid(struct pldm_transport_af_mctp *ctx,
 				     __attribute__((unused)) pldm_tid_t tid,
 				     mctp_eid_t eid)
@@ -122,6 +127,7 @@
 	return PLDM_REQUESTER_SUCCESS;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_af_mctp_init(struct pldm_transport_af_mctp **ctx)
 {
 	if (!ctx || *ctx) {
@@ -147,6 +153,7 @@
 	return 0;
 }
 
+LIBPLDM_ABI_TESTING
 void pldm_transport_af_mctp_destroy(struct pldm_transport_af_mctp *ctx)
 {
 	if (!ctx) {
diff --git a/src/transport/mctp-demux.c b/src/transport/mctp-demux.c
index 91946d2..466d33c 100644
--- a/src/transport/mctp-demux.c
+++ b/src/transport/mctp-demux.c
@@ -1,4 +1,5 @@
-#include "../mctp-defines.h"
+#include "config.h"
+#include "mctp-defines.h"
 #include "base.h"
 #include "container-of.h"
 #include "libpldm/pldm.h"
@@ -28,6 +29,7 @@
 #define transport_to_demux(ptr)                                                \
 	container_of(ptr, struct pldm_transport_mctp_demux, transport)
 
+LIBPLDM_ABI_TESTING
 struct pldm_transport *
 pldm_transport_mctp_demux_core(struct pldm_transport_mctp_demux *ctx)
 {
@@ -61,6 +63,7 @@
 	return fd;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_mctp_demux_init_pollfd(struct pldm_transport *t,
 					  struct pollfd *pollfd)
 {
@@ -85,6 +88,7 @@
 	return -1;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_mctp_demux_map_tid(struct pldm_transport_mctp_demux *ctx,
 				      pldm_tid_t tid, mctp_eid_t eid)
 {
@@ -93,6 +97,7 @@
 	return 0;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_mctp_demux_unmap_tid(struct pldm_transport_mctp_demux *ctx,
 					__attribute__((unused)) pldm_tid_t tid,
 					mctp_eid_t eid)
@@ -183,6 +188,7 @@
 	return PLDM_REQUESTER_SUCCESS;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_mctp_demux_init(struct pldm_transport_mctp_demux **ctx)
 {
 	if (!ctx || *ctx) {
@@ -209,6 +215,7 @@
 	return 0;
 }
 
+LIBPLDM_ABI_TESTING
 void pldm_transport_mctp_demux_destroy(struct pldm_transport_mctp_demux *ctx)
 {
 	if (!ctx) {
@@ -219,6 +226,7 @@
 }
 
 /* Temporary for old API */
+LIBPLDM_ABI_TESTING
 struct pldm_transport_mctp_demux *
 pldm_transport_mctp_demux_init_with_fd(int mctp_fd)
 {
@@ -244,6 +252,7 @@
 	return demux;
 }
 
+LIBPLDM_ABI_TESTING
 int pldm_transport_mctp_demux_get_socket_fd(
 	struct pldm_transport_mctp_demux *ctx)
 {
diff --git a/src/transport/transport.c b/src/transport/transport.c
index 77a33f8..0cbef29 100644
--- a/src/transport/transport.c
+++ b/src/transport/transport.c
@@ -1,3 +1,4 @@
+#include "config.h"
 #include "libpldm/transport.h"
 #include "base.h"
 #include "libpldm/requester/pldm.h"
@@ -29,6 +30,7 @@
 }
 #endif
 
+LIBPLDM_ABI_TESTING
 pldm_requester_rc_t pldm_transport_poll(struct pldm_transport *transport,
 					int timeout)
 {
@@ -50,6 +52,7 @@
 	return PLDM_REQUESTER_SUCCESS;
 }
 
+LIBPLDM_ABI_TESTING
 pldm_requester_rc_t pldm_transport_send_msg(struct pldm_transport *transport,
 					    pldm_tid_t tid,
 					    const void *pldm_req_msg,
@@ -71,6 +74,7 @@
 	return transport->send(transport, tid, pldm_req_msg, req_msg_len);
 }
 
+LIBPLDM_ABI_TESTING
 pldm_requester_rc_t pldm_transport_recv_msg(struct pldm_transport *transport,
 					    pldm_tid_t tid,
 					    void **pldm_resp_msg,
@@ -146,6 +150,7 @@
 	return 0;
 }
 
+LIBPLDM_ABI_TESTING
 pldm_requester_rc_t
 pldm_transport_send_recv_msg(struct pldm_transport *transport, pldm_tid_t tid,
 			     const void *pldm_req_msg, size_t req_msg_len,