encoder.go | 3 +--
 errors.go  | 2 --
 opus.go    | 2 +-

diff --git a/encoder.go b/encoder.go
index 700d51563c7d2900b6f44b1918ef1d28a820b575..1099ae882f92eb255d1c77ee3fbd70ba8953ee99 100644
--- a/encoder.go
+++ b/encoder.go
@@ -17,8 +17,7 @@ import "C"
 
 var errEncUninitialized = fmt.Errorf("opus encoder uninitialized")
 
-// Encoder contains the state of an Opus encoder for libopus. Do not use this
-// directly, but call
+// Encoder contains the state of an Opus encoder for libopus.
 type Encoder struct {
 	p *C.struct_OpusEncoder
 	// Memory for the encoder struct allocated on the Go heap to allow Go GC to
diff --git a/errors.go b/errors.go
index f3f606dd319b1cf96cfa0960badf8e06a019c0e0..9bf482e4b42b8895cd862c24940bcdf3cfccaf5e 100644
--- a/errors.go
+++ b/errors.go
@@ -30,8 +30,6 @@ import "C"
 
 type opusFileError int
 
-var opusfileErrcodes = map[C.int]error{}
-
 var (
 	ERR_OP_FALSE         = opusFileError(C.CONST_OP_FALSE)
 	ERR_OP_EOF           = opusFileError(C.CONST_OP_EOF)
diff --git a/opus.go b/opus.go
index 3d6fc6da3d966ca35c56c4c904a2d284008045ca..56e70cd803584da5980ff7bfe93c4f19802fdb68 100644
--- a/opus.go
+++ b/opus.go
@@ -18,7 +18,7 @@ #cgo LDFLAGS: libopusfile.a libopus.a -logg -lm
 #cgo CFLAGS: -std=c99 -Wall -Werror -pedantic -Ibuild/include
 #include <opus/opus.h>
 
-// Remap #defines to avoid depending on their literal value
+// Access the preprocessor from CGO
 const int CONST_APPLICATION_VOIP = OPUS_APPLICATION_VOIP;
 const int CONST_APPLICATION_AUDIO = OPUS_APPLICATION_AUDIO;
 const int CONST_APPLICATION_RESTRICTED_LOWDELAY = OPUS_APPLICATION_RESTRICTED_LOWDELAY;