diff --git a/src/runtime/cgo/freebsd.go b/src/runtime/cgo/freebsd.go
index 09ffa2377a..f0628b7aa0 100644
--- a/src/runtime/cgo/freebsd.go
+++ b/src/runtime/cgo/freebsd.go
@@ -6,6 +6,8 @@
 
 package cgo
 
+import _ "unsafe"
+
 // Supply environ and __progname, because we don't
 // link against the standard FreeBSD crt0.o and the
 // libc dynamic library needs them.
diff --git a/src/runtime/cgo/netbsd.go b/src/runtime/cgo/netbsd.go
index 9088e35d47..67f96530c1 100644
--- a/src/runtime/cgo/netbsd.go
+++ b/src/runtime/cgo/netbsd.go
@@ -6,6 +6,8 @@
 
 package cgo
 
+import _ "unsafe"
+
 // Supply environ and __progname, because we don't
 // link against the standard NetBSD crt0.o and the
 // libc dynamic library needs them.
diff --git a/src/runtime/cgo/openbsd.go b/src/runtime/cgo/openbsd.go
index b59a7c2c2a..29ebcf83aa 100644
--- a/src/runtime/cgo/openbsd.go
+++ b/src/runtime/cgo/openbsd.go
@@ -6,6 +6,8 @@
 
 package cgo
 
+import _ "unsafe"
+
 // Supply environ, __progname and __guard_local, because
 // we don't link against the standard OpenBSD crt0.o and
 // the libc dynamic library needs them.