Index: src/cmd/dist/build.go
--- src/cmd/dist/build.go.orig
+++ src/cmd/dist/build.go
@@ -1589,6 +1589,7 @@ var cgoEnabled = map[string]bool{
 	"openbsd/arm":     true,
 	"openbsd/arm64":   true,
 	"openbsd/mips64":  true,
+	"openbsd/riscv64": true,
 	"plan9/386":       false,
 	"plan9/amd64":     false,
 	"plan9/arm":       false,
