diff --git a/src/go/types/hilbert_test.go b/src/go/types/hilbert_test.go
index 916d6fdba2..41d1a2a7dc 100644
--- a/src/go/types/hilbert_test.go
+++ b/src/go/types/hilbert_test.go
@@ -52,6 +52,8 @@ func program(n int, out string) []byte {
 
 	g.p(`// Code generated by: go test -run=Hilbert -H=%d -out=%q. DO NOT EDIT.
 
+// +build ignore
+
 // This program tests arbitrary precision constant arithmetic
 // by generating the constant elements of a Hilbert matrix H,
 // its inverse I, and the product P = H*I. The product should