diff --git a/include/rdma/fabric.h b/include/rdma/fabric.h
index a705ba6e200..0e42ee6c057 100644
--- a/include/rdma/fabric.h
+++ b/include/rdma/fabric.h
@@ -346,6 +346,7 @@ enum {
 	FI_PROTO_COLL,
 	FI_PROTO_UCX,
 	FI_PROTO_SM2,
+	FI_PROTO_CXI_CS,
 };
 
 enum {
diff --git a/man/fi_endpoint.3.md b/man/fi_endpoint.3.md
index 819e00d350a..4adea87a8a0 100644
--- a/man/fi_endpoint.3.md
+++ b/man/fi_endpoint.3.md
@@ -753,6 +753,14 @@ protocol value set to one.
 : Protocol for intra-node communication using shared memory segments
   used by the sm2 provider
 
+*FI_PROTO_CXI*
+: Reliable-datagram protocol optimized for HPC applications
+  used by cxi provider.
+
+*FI_PROTO_CXI_CS*
+: A version of the FI_PROTO_CXI protocol that targets use in client/server
+  environments.
+
 *FI_PROTO_UNSPEC*
 : The protocol is not specified.  This is usually provided as input,
   with other attributes of the socket or the provider selecting the
diff --git a/src/fi_tostr.c b/src/fi_tostr.c
index 2b95be5b87c..c6fd1a36d86 100644
--- a/src/fi_tostr.c
+++ b/src/fi_tostr.c
@@ -275,6 +275,7 @@ static void ofi_tostr_protocol(char *buf, size_t len, uint32_t protocol)
 	CASEENUMSTRN(FI_PROTO_CXI, len);
 	CASEENUMSTRN(FI_PROTO_XNET, len);
 	CASEENUMSTRN(FI_PROTO_SM2, len);
+	CASEENUMSTRN(FI_PROTO_CXI_CS, len);
 	default:
 		if (protocol & FI_PROV_SPECIFIC)
 			ofi_strncatf(buf, len, "Provider specific");