diff --git a/client.go b/client.go
index b6e227d..37a668c 100644
--- a/client.go
+++ b/client.go
@@ -4,21 +4,12 @@ import (
 	"bufio"
 	"crypto/tls"
 	"crypto/x509"
-	"errors"
 	"io/ioutil"
 	"net"
 	"net/url"
 	"strconv"
 )
 
-// Client errors.
-var (
-	ErrInvalidURL            = errors.New("gemini: invalid URL")
-	ErrInvalidResponse       = errors.New("gemini: invalid response")
-	ErrCertificateUnknown    = errors.New("gemini: unknown certificate")
-	ErrCertificateNotTrusted = errors.New("gemini: certificate is not trusted")
-)
-
 // Request represents a Gemini request.
 type Request struct {
 	// URL specifies the URL being requested.
diff --git a/fs.go b/fs.go
index f899782..f7c0d16 100644
--- a/fs.go
+++ b/fs.go
@@ -1,7 +1,6 @@
 package gmi
 
 import (
-	"errors"
 	"io"
 	"mime"
 	"os"
@@ -15,11 +14,6 @@ func init() {
 	mime.AddExtensionType(".gemini", "text/gemini")
 }
 
-// FileServer errors.
-var (
-	ErrNotAFile = errors.New("gemini: not a file")
-)
-
 // FileServer takes a filesystem and returns a Handler which uses that filesystem.
 // The returned Handler sanitizes paths before handling them.
 func FileServer(fsys FS) Handler {
diff --git a/gemini.go b/gemini.go
index 3c137c1..c36e96e 100644
--- a/gemini.go
+++ b/gemini.go
@@ -3,6 +3,7 @@ package gmi
 import (
 	"crypto/tls"
 	"crypto/x509"
+	"errors"
 	"sync"
 	"time"
 )
@@ -39,10 +40,21 @@ const (
 	StatusClassCertificateRequired = 6
 )
 
+// Errors.
+var (
+	ErrInvalidURL            = errors.New("gmi: invalid URL")
+	ErrInvalidResponse       = errors.New("gmi: invalid response")
+	ErrCertificateUnknown    = errors.New("gmi: unknown certificate")
+	ErrCertificateExpired    = errors.New("gmi: certificate expired")
+	ErrCertificateNotTrusted = errors.New("gmi: certificate is not trusted")
+	ErrNotAFile              = errors.New("gmi: not a file")
+	ErrBodyNotAllowed        = errors.New("gmi: response status code does not allow for body")
+)
+
 // DefaultClient is the default client. It is used by Send.
 //
 // On the first request, DefaultClient will load the default list of known hosts.
-var DefaultClient = &Client{}
+var DefaultClient Client
 
 var (
 	crlf = []byte("\r\n")
diff --git a/server.go b/server.go
index cc5f6f7..f3468a4 100644
--- a/server.go
+++ b/server.go
@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"crypto/tls"
 	"crypto/x509"
-	"errors"
 	"log"
 	"net"
 	"net/url"
@@ -16,12 +15,6 @@ import (
 	"time"
 )
 
-// Server errors.
-var (
-	ErrBodyNotAllowed     = errors.New("gemini: response status code does not allow for body")
-	ErrCertificateExpired = errors.New("gemini: certificate expired")
-)
-
 // Server is a Gemini server.
 type Server struct {
 	// Addr specifies the address that the server should listen on.