diff --git a/fio.1 b/fio.1
index 65877d2..21ccda5 100644
--- a/fio.1
+++ b/fio.1
@@ -411,8 +411,8 @@
 See <http://www.xmailserver.org/guasi\-lib.html>.
 .TP
 .B rdma
-The RDMA I/O engine supports both RDMA memory semantic(RDMA_WRITE/RDMA_READ)
-and channel semantic(Send/Recv) in InfiniBand, RoCE and iWarp environment.
+The RDMA I/O engine supports both RDMA memory semantics (RDMA_WRITE/RDMA_READ)
+and channel semantics (Send/Recv) for the InfiniBand, RoCE and iWARP protocols.
 .TP
 .B external
 Loads an external I/O engine object file.  Append the engine filename as