diff --git a/src/pkg/crypto/rand/rand_unix.go b/src/pkg/crypto/rand/rand_unix.go
index 18f482472d..238ceee557 100644
--- a/src/pkg/crypto/rand/rand_unix.go
+++ b/src/pkg/crypto/rand/rand_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux netbsd openbsd plan9
+// +build darwin dragonfly freebsd linux netbsd openbsd plan9
 
 // Unix cryptographically secure pseudorandom number
 // generator.
diff --git a/src/pkg/crypto/x509/root_unix.go b/src/pkg/crypto/x509/root_unix.go
index 1b25a94d08..770ca66cd3 100644
--- a/src/pkg/crypto/x509/root_unix.go
+++ b/src/pkg/crypto/x509/root_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build freebsd linux openbsd netbsd
+// +build dragonfly freebsd linux openbsd netbsd
 
 package x509
 
@@ -14,7 +14,7 @@ var certFiles = []string{
 	"/etc/pki/tls/certs/ca-bundle.crt",       // Fedora/RHEL
 	"/etc/ssl/ca-bundle.pem",                 // OpenSUSE
 	"/etc/ssl/cert.pem",                      // OpenBSD
-	"/usr/local/share/certs/ca-root-nss.crt", // FreeBSD
+	"/usr/local/share/certs/ca-root-nss.crt", // FreeBSD/DragonFly
 }
 
 func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) {
diff --git a/src/pkg/mime/type_unix.go b/src/pkg/mime/type_unix.go
index e0050bb958..713e301cdf 100644
--- a/src/pkg/mime/type_unix.go
+++ b/src/pkg/mime/type_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
 
 package mime
 
diff --git a/src/pkg/path/filepath/path_unix.go b/src/pkg/path/filepath/path_unix.go
index cff7b2c65c..d927b342be 100644
--- a/src/pkg/path/filepath/path_unix.go
+++ b/src/pkg/path/filepath/path_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
 
 package filepath
 
diff --git a/src/pkg/time/sys_unix.go b/src/pkg/time/sys_unix.go
index 7f69b492c9..60a3ce08f9 100644
--- a/src/pkg/time/sys_unix.go
+++ b/src/pkg/time/sys_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
 
 package time
 
diff --git a/src/pkg/time/zoneinfo_unix.go b/src/pkg/time/zoneinfo_unix.go
index 2c951a9834..53b5dc82cb 100644
--- a/src/pkg/time/zoneinfo_unix.go
+++ b/src/pkg/time/zoneinfo_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
 
 // Parse "zoneinfo" time zone file.
 // This is a fairly standard file format used on OS X, Linux, BSD, Sun, and others.