diff --git a/GoGenerateTools.md b/GoGenerateTools.md
index e2657f0..223462d 100644
--- a/GoGenerateTools.md
+++ b/GoGenerateTools.md
@@ -2,5 +2,6 @@
 
 * [go tool yacc](https://golang.org/cmd/yacc/) – Yacc for Go.
 * [stringer](https://godoc.org/golang.org/x/tools/cmd/stringer) – Implements `fmt.Stringer` interface for enums.
+* [gostringer](https://godoc.org/github.com/sourcegraph/gostringer) – Implements `fmt.GoStringer` interface for enums.
 * [jsonenums](https://github.com/campoy/jsonenums) – Implements `json.Marshaler` and `json.Unmarshaler` interfaces for enums.
 * [gen-mocks](https://sourcegraph.com/sourcegraph/gen-mocks) – Generate mocks for interfaces. Used in [go-sourcegraph](https://sourcegraph.com/sourcegraph.com/sourcegraph/go-sourcegraph@master/.tree/sourcegraph).
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