diff --git a/rpc_util.go b/rpc_util.go
index 06544adba..fe3748d97 100644
--- a/rpc_util.go
+++ b/rpc_util.go
@@ -61,7 +61,7 @@ type Codec interface {
 	String() string
 }
 
-// protoCodec is a Codec implemetation with protobuf. It is the default codec for gRPC.
+// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
 type protoCodec struct{}
 
 func (protoCodec) Marshal(v interface{}) ([]byte, error) {
@@ -187,7 +187,7 @@ const (
 	compressionMade
 )
 
-// parser reads complelete gRPC messages from the underlying reader.
+// parser reads complete gRPC messages from the underlying reader.
 type parser struct {
 	// r is the underlying reader.
 	// See the comment on recvMsg for the permissible
diff --git a/stream.go b/stream.go
index de125d5be..25be4b819 100644
--- a/stream.go
+++ b/stream.go
@@ -79,7 +79,7 @@ type Stream interface {
 	RecvMsg(m interface{}) error
 }
 
-// ClientStream defines the interface a client stream has to satify.
+// ClientStream defines the interface a client stream has to satisfy.
 type ClientStream interface {
 	// Header returns the header metadata received from the server if there
 	// is any. It blocks if the metadata is not ready to read.