diff --git a/src/go/doc/comment/parse.go b/src/go/doc/comment/parse.go
index 444aa707a2..7b60e7ad5b 100644
--- a/src/go/doc/comment/parse.go
+++ b/src/go/doc/comment/parse.go
@@ -260,10 +260,9 @@ func (d *parseDoc) lookupPkg(pkg string) (importPath string, ok bool) {
 }
 
 func isStdPkg(path string) bool {
-	_, ok := sort.Find(len(stdPkgs), func(i int) int {
-		return strings.Compare(path, stdPkgs[i])
-	})
-	return ok
+	// TODO: Use slices.BinarySearch when possible.
+	i := sort.Search(len(stdPkgs), func(i int) bool { return stdPkgs[i] >= path })
+	return i < len(stdPkgs) && stdPkgs[i] == path
 }
 
 // DefaultLookupPackage is the default package lookup